Knowing what to expect during TMS treatment can make each session feel more manageable. Most people notice sensations at the treatment site, such as tapping, tingling, or mild scalp discomfort, and some experience a headache after a session. These responses are familiar to the care team and are usually mild and temporary. Still, significant discomfort, worsening symptoms, or unexpected mood changes deserve a conversation with your provider rather than being dismissed as part of the treatment.
TMS therapy side effects are most often limited to the treatment site and short-lived, with headache and scalp discomfort the most commonly reported. Breathing a little easier is reasonable: serious effects such as seizures or hearing impairment are uncommon, and your clinicians are trained to recognize and respond to anything unusual. The guidance below helps you tell an expected sensation from a symptom that needs prompt attention.
If you are exploring TMS therapy for depression, understanding these differences is one part of preparing for treatment. You will also want to know how a session feels, how long any side effects last, and how your care team monitors your safety throughout the course. The sections below cover the most common sensations, how they may change over time, and when to contact your provider.
Request a consultation today to discuss whether TMS may fit your treatment plan.
The Most Common TMS Therapy Side Effects, Explained
Most tms therapy side effects are mild, localized, and temporary. The sensations patients notice most often are a headache, discomfort where the magnetic pulses are applied, and brief twitching in nearby facial muscles.
Headache after or during treatment
Headache is the most frequently reported side effect of TMS therapy. It may feel like pressure, soreness, or a typical mild headache near the treatment area. A review of repetitive TMS describes headaches and local pain at the stimulation site as common, generally mild effects. Read the clinical review of TMS safety and tolerability.
Some patients report that headaches become less noticeable after the first few treatments as they adjust to the stimulation. Tell your treatment team when a headache occurs, how intense it feels, and how long it lasts. Your provider can help you decide whether a simple comfort measure is appropriate for you and can make adjustments when needed.
Scalp tapping, tingling, or tenderness
During stimulation, the magnetic coil rests against or near the scalp. The pulses can create a tapping or tingling sensation at the treatment site. Some people also notice temporary tenderness or local discomfort afterward. These sensations are expected parts of how the stimulation feels, not evidence that the treatment is harming the scalp.
Common sensations may include:
- Rhythmic tapping or clicking near the coil
- Tingling or pressure on the scalp
- Mild tenderness at the treatment site after the session
Let the clinician know if the positioning feels uncomfortable. Small adjustments to the coil position or treatment settings may make the session easier while preserving careful clinical monitoring.
Brief facial or mouth twitching
The magnetic pulse can briefly stimulate nearby scalp muscles or nerves. As a result, some patients notice a short movement or twitch in the cheek, jaw, or mouth during a pulse. This usually stops when the pulse stops and is generally mild and temporary. Mention it to your clinician so the treatment team can observe the response and confirm that the coil placement remains comfortable.
In summary, the most common experiences are usually short-lived and manageable:
- Headache: the most frequently reported side effect, often mild.
- Scalp discomfort: tapping, tingling, pressure, or tenderness at the stimulation site.
- Facial movement: brief cheek, jaw, or mouth twitching during a magnetic pulse.
Individual responses vary, so share any significant discomfort or unexpected change with your provider rather than stopping treatment on your own. Personalized guidance from a qualified TMS team is the best way to understand what you are feeling during a course of care.
Are TMS Therapy Side Effects Permanent?
No. TMS therapy side effects are generally mild and temporary. For many patients, discomfort fades shortly after a treatment session. When symptoms continue beyond the session, they often improve during the first days or weeks as the brain and scalp adapt to stimulation.
The most common example is a headache or localized tenderness near the treatment site. A tapping or tingling sensation can also feel uncomfortable at first. These effects do not necessarily remain at the same intensity throughout a treatment course. Headaches often improve after the first few sessions, and the treatment team can adjust settings or discuss practical ways to make sessions more comfortable.
Are TMS therapy side effects permanent?
Usually not. TMS side effects are typically mild and short-lived, resolving shortly after treatment or improving within the first days or weeks. Tell your provider if discomfort is persistent, severe, or different from what you expected.
Duration can vary from one person to another. Your experience may depend on treatment settings, sensitivity at the stimulation site, and your individual medical history. A provider should evaluate symptoms that do not follow the expected pattern rather than assuming they are part of normal adjustment. Contact your treatment team about significant discomfort, unexpected mood changes, or worsening symptoms.
How TMS differs from common antidepressant side effects
TMS delivers magnetic stimulation to a targeted area of the brain rather than circulating throughout the body like an oral medication. As a result, it typically does not cause systemic side effects commonly associated with some antidepressants, such as weight gain or sexual dysfunction. That does not mean every patient will have the same experience, and TMS is not free of possible adverse effects. It means the side-effect profile is different and is usually localized to the treatment area or session.
If you are weighing treatment options, discuss your current medications, diagnoses, and side-effect concerns during an evaluation. A clinician can explain what may be expected in your situation and how the team will monitor your comfort. For broader context, read about TMS therapy side effects and safety.
Rare but Serious Side Effects of TMS
TMS is generally well tolerated, but no medical treatment is completely without risk. A review of repetitive TMS safety found that severe adverse effects, including seizures, hearing impairment, or mania, are uncommon. This information should provide context rather than alarm. Careful screening, appropriate treatment settings, and ongoing clinician supervision help the care team identify and manage safety concerns.
What serious risks may be considered?
A seizure is a rare but recognized potential risk of TMS. Hearing-related concerns may also be considered because the magnetic pulses create a clicking sound near the head. Mania, which can involve an unusually elevated or irritable mood, reduced need for sleep, and increased activity. Is another uncommon concern that clinicians may monitor for, particularly when a patient has a relevant psychiatric history. The review that discusses these risks emphasizes that severe adverse effects are uncommon, not that they are impossible. Read more about how TMS therapy treats depression and why an individualized evaluation matters.
Tell your treatment team about any unexpected mood changes, worsening symptoms, unusual sensations, or significant discomfort. Do not wait until the next scheduled appointment if a symptom feels severe or concerning. Your provider can determine whether it may be related to treatment and explain what to do next.
Why screening matters before treatment
Some people require additional consideration before TMS begins. The safety review identifies adolescents, pregnant patients, older adults, and people with metal or electronic implants as populations that may need individualized prescribing and monitoring. This does not automatically determine whether TMS is appropriate. Instead, it signals the importance of a detailed health history and a conversation with a qualified clinician.
Be prepared to discuss implanted or retained metal, electronic medical devices, prior neurological concerns. Pregnancy or plans for pregnancy, current medications, sleep changes, and past episodes of unusually elevated mood. Share information about hearing sensitivity and any other medical factor that could affect treatment planning. Your care team may ask follow-up questions or recommend additional precautions based on your circumstances.
During the course, clinicians can monitor your response, adjust treatment when appropriate, and address concerns as they arise. This supervision is one reason it is important not to treat a general online list of TMS therapy side effects and safety as a personal risk assessment. Request a provider evaluation to discuss your health history, safety considerations, and whether TMS may be a suitable option for you.
What TMS Side Effects Feel Like During a Session
During a TMS session, you may notice a repeated tapping or tingling sensation on your scalp where the treatment coil rests. The feeling comes from magnetic pulses delivered to a specific area of the brain. It can feel unfamiliar at first, but it is generally a physical response to the stimulation rather than a sign that something is wrong.
A tapping or tingling feeling at the treatment site
Many patients describe the sensation as light tapping, clicking, or tingling along the scalp. You may feel it with each pulse, particularly while the clinician is adjusting the treatment settings. Some people notice more scalp sensitivity than others. The sensation can be stronger during the early part of treatment and may become easier to anticipate as you learn what a session feels like.
Scalp discomfort at the stimulation site is a recognized response during TMS therapy. Johns Hopkins describes it as a tapping or tingling sensation during stimulation. The discomfort is typically local rather than widespread, and your treatment team can discuss adjustments if it becomes difficult to tolerate. Learn more about TMS therapy for depression and what a treatment course may involve.
Brief facial or jaw muscle movement
The magnetic pulse can also stimulate nearby muscles. You may notice a brief twitch around the cheek, eyebrow, mouth, or jaw while the pulses are delivered. This movement is usually short and occurs in time with the stimulation. It does not necessarily mean that the treatment is harming your face or jaw.
Tell the clinician what you are feeling, especially if the twitching is uncomfortable or continues between pulses. The team can observe the response and help determine whether a positioning or setting adjustment would make the session more comfortable. You should not feel pressured to simply endure significant discomfort.
A mild headache after treatment
A mild headache or tenderness near the treatment site may occur after a session. Headache is frequently reported among TMS therapy side effects, and medical literature describes common effects such as headache or local stimulation-site pain as typically mild. A review of rTMS safety and tolerability provides additional clinical context. Some patients find that headaches become less noticeable after the first few treatments, but your experience may differ.
Quick question and answer
Is facial twitching normal during TMS treatment?
Short movements in the face or jaw can occur during a magnetic pulse. Tell your clinician if the movement is painful, persistent, or concerning so it can be assessed during the session.
What causes scalp discomfort during TMS therapy?
The magnetic pulses can stimulate scalp muscles or nerves near the treatment site, creating a tapping, tingling, or mildly uncomfortable feeling. Your provider can help you understand what is expected for your treatment.
Because each person responds differently, describe new or significant symptoms to your treatment team rather than trying to interpret them alone. Unexpected mood changes, worsening symptoms, or substantial discomfort warrant a call to your provider.
How Relief Mental Health Monitors Patient Safety During TMS
Patient safety begins before the first magnetic pulse. Relief Mental Health uses a structured evaluation to understand each patient’s diagnosis, symptoms, medical history, current medications, treatment goals, and relevant safety considerations. This preparation helps the clinical team determine whether TMS is appropriate and establish a thoughtful plan for monitoring the patient’s response.
A thorough evaluation identifies important safety considerations
The initial screening is especially important for people who have metal or electronic implants, or who fall into another group requiring additional clinical consideration. Research notes that patients with metal or electronic implants, as well as adolescents, pregnant patients, and older adults, may need special attention when TMS is prescribed and monitored. Reviewing these factors before treatment gives the clinician an opportunity to ask focused questions, clarify relevant medical details, and make an individualized safety decision.
Patients should share complete and accurate information during this evaluation, including implanted devices. Metal in or near the head or neck, a history of seizures, changes in medication, and any new or significant medical concerns. Do not assume that a detail is too minor to mention. The purpose of screening is not to create unnecessary worry. It is to give the treatment team the information needed to plan responsibly and answer questions before sessions begin.
Clinicians supervise each session and track the response
TMS sessions are conducted under clinical supervision rather than being treated as a one-size-fits-all procedure. The team observes how the patient responds to the stimulation and asks about sensations such as tapping, tingling, scalp discomfort, or headache. Some discomfort can occur at the treatment site, but a patient should communicate what they are feeling so the clinician can assess it in context.
Relief Mental Health provides outpatient care through 12 locations across Illinois, Wisconsin, Colorado, and New Jersey, with a focus on specialized treatments such as TMS. Whether a patient is learning about TMS therapy for depression or preparing to begin a course of sessions, the care team remains attentive throughout. The evaluation and treatment visits give the team the chance to keep the plan responsive to the patient’s needs.
The treatment plan can be adjusted when needed
Monitoring does not end after the intake appointment. Clinicians consider the patient’s feedback, comfort, mood, symptoms, and overall response throughout treatment. If a patient reports significant discomfort, an unexpected mood change, or another concern. The team can pause to evaluate what is happening and determine whether an adjustment or additional follow-up is appropriate.
This collaborative approach allows patients to participate actively in their care. TMS therapy side effects should not be minimized or ignored, even when they are often mild. Patients can tell the team what feels different, ask for clarification, and receive guidance based on their individual history. A careful evaluation, supervised sessions, and ongoing communication create the foundation for a safer, more personalized treatment experience.
When Should You Contact Your Provider During TMS Treatment?
Most TMS sessions involve sensations such as tapping, tingling, or mild discomfort at the stimulation site. These effects are often manageable, but you should keep your care team informed when something feels different from what you were told to expect. Your provider can help determine whether an adjustment, additional monitoring, or another response is appropriate.
Reach out promptly if you notice:
- An unexpected change in mood. Tell your provider about a marked shift in how you feel, especially if it is new, intense, or unlike your usual experience.
- Worsening symptoms. If the symptoms being treated become noticeably worse, contact your care team rather than trying to assess the change on your own. The Mayo Clinic advises patients to contact their doctor about unexpected mood changes or worsening symptoms during TMS treatment: Mayo Clinic guidance on transcranial magnetic stimulation.
- Significant discomfort. Mild headache or local discomfort can occur, but pain that is severe, persistent, or increasingly difficult to tolerate deserves a call to your provider.
- A reaction that does not fit your normal pattern. If a sensation is new, unusually strong, lasts longer than expected, or simply concerns you, describe it to the team before your next session.
- Any concern about continuing treatment. Your questions are clinically useful. Let the team know if you are worried about a symptom, unsure whether it is expected, or having difficulty completing a session comfortably.
What may be normal?
Headache and scalp discomfort are among the commonly reported effects of TMS. During stimulation, some people notice tapping or tingling where the magnetic pulses are delivered. These effects are generally mild, and many patients find that they become easier to manage as treatment continues. Your own experience may differ, so your provider’s instructions should guide decisions about your care.
Contacting the team does not automatically mean that treatment must stop. The clinician may ask when the symptom began, how long it lasted, how intense it felt, and whether it occurred during or after the session. Sharing those details helps the team respond thoughtfully and decide whether any change to the session plan is needed.
Normal versus worthy of a call: a quick reference
| Usually normal | Worth mentioning to your provider |
|---|---|
| Mild headache that fades after a session | A severe, persistent, or worsening headache |
| Light tapping, tingling, or scalp tenderness at the treatment site | Significant discomfort that does not improve or makes sessions hard to complete |
| Brief cheek or jaw twitching that stops with the pulse | Unusual, strong, or ongoing muscle movements |
| Familiar mixture of sensations across early sessions | An unexpected mood change or worsening symptoms |
Read the table as a general guide, not a personal risk assessment. When something feels different from what you expected, share it with your care team. They can determine whether it is part of the normal response or a change that needs evaluation.
Do not stop TMS on your own because of a new symptom or concern. Call or message your care team, follow the instructions they provide, and seek urgent medical help for an emergency. Open communication allows your providers to support you while keeping the treatment plan responsive to your needs.
Frequently Asked Questions
What are the common side effects of TMS therapy?
The most common effects are mild headache, scalp discomfort, or a tapping or tingling sensation where stimulation is delivered. Brief facial or mouth twitching can also occur during a magnetic pulse. These effects are usually manageable and temporary. (Sources: PubMed; Johns Hopkins Medicine.)
Are TMS therapy side effects permanent?
No. TMS side effects are generally mild and resolve shortly after treatment. Headaches and scalp sensitivity may be more noticeable during the first few sessions, then often improve as treatment continues. Tell your provider if discomfort persists or interferes with daily activities.
Does TMS therapy cause weight gain or sexual side effects?
TMS is localized stimulation, so it typically does not cause systemic medication effects such as weight gain or sexual dysfunction. Your individual experience may vary, especially if you take other medications, so discuss any new or concerning symptoms with your treatment team.
When should I contact my TMS provider?
Contact your provider about significant or persistent discomfort, unexpected mood changes, worsening symptoms, or anything that feels unusual for you. Severe adverse effects, including seizures, hearing impairment, or mania, are uncommon, but urgent symptoms require prompt medical attention. (Source: Mayo Clinic; PubMed.)
Take the Next Step in Your Care
TMS therapy side effects are usually mild and temporary, and understanding what is normal helps you approach treatment with confidence. If you are considering transcranial magnetic stimulation for treatment-resistant depression and want to learn whether it is a good fit for your situation. The clinical team at Relief Mental Health can help. With 12 outpatient locations across Illinois, Wisconsin, Colorado, and New Jersey. Relief Mental Health specializes in evidence-based treatments including TMS for adults who have not found relief with conventional care.
Start by scheduling a consultation, where a provider can review your history, answer questions about the treatment process, and determine whether TMS is appropriate for you.
Request a consultation today to learn whether TMS therapy may be right for you.
