Transcranial magnetic stimulation (TMS) is a non-invasive treatment that uses targeted magnetic pulses to stimulate specific areas of the brain. Unlike many treatments that involve systemic medication, TMS therapy does not require anesthesia or surgery. Still, you may experience some temporary side effects during or after a session. Knowing what to expect can make starting treatment feel more comfortable.
Most TMS side effects are mild and temporary. Because the magnetic pulses are delivered through a coil positioned against the scalp, some people notice sensations around the treatment area.
Common side effects can include:
These effects may be more noticeable during the first few sessions as you become accustomed to the sensation. Your treatment team can adjust the stimulation settings when appropriate to improve comfort.
TMS is generally well tolerated, but the magnetic pulses can feel unusual at first. You may notice tapping or clicking sensations against your scalp during stimulation.
Some people experience mild scalp discomfort or a headache during or shortly after treatment. For many patients, these effects become easier to tolerate as treatment continues.
TMS does not involve needles, incisions, or general anesthesia. You remain awake and able to communicate with the treatment team throughout the session.
Side effects from TMS are generally short-lived. A mild headache or scalp discomfort may occur during treatment or shortly afterward and typically improves without significant intervention.
Your response can vary depending on factors such as treatment intensity and individual sensitivity. Your provider monitors how you respond throughout the treatment course and can make appropriate adjustments when needed.
Because TMS sessions are designed to fit into a patient’s normal routine, many people can return to their usual daily activities after treatment.
TMS is considered a generally safe treatment when appropriately administered, but no medical treatment is completely without risk. A rare but serious potential complication is a seizure.
Your initial assessment helps determine whether TMS is appropriate for you. Your medical history, current medications, and other relevant factors should be reviewed before treatment begins.
TMS also may not be appropriate for everyone, particularly people with certain implanted metallic or electronic devices. A thorough evaluation helps identify potential safety concerns before treatment starts.
Your treatment team should know about any symptoms you experience during or after a session. Reporting discomfort allows the provider to determine whether adjustments may improve your experience.
During the treatment process, your response is monitored so the treatment can be delivered as safely and comfortably as possible. Follow-up care also provides an opportunity to discuss changes in symptoms, side effects, and overall progress.
TMS treatment is not simply a series of identical sessions. Your response can help guide ongoing care. Communicating openly with your provider allows your treatment plan to remain focused on both safety and therapeutic goals.
Preparing for a TMS session is generally straightforward. You will receive instructions based on your individual treatment plan and medical history. Since TMS does not typically require sedation or a recovery period, many patients can resume normal activities afterward.
Understanding the expected sensations and possible side effects can also reduce uncertainty before your first appointment. Our Team can answer questions about what you may experience and explain how your sessions will be monitored.
At Scottsdale TMS & Spravato, treatment is personalized around each patient’s needs, with an emphasis on careful evaluation, monitoring, and supportive care throughout the treatment process.
TMS side effects are typically mild and temporary, with headache, scalp discomfort, tingling, and lightheadedness among the possible experiences. Serious complications are uncommon, but appropriate screening and monitoring remain important. Understanding what to expect can help you approach treatment with greater confidence. Scottsdale TMS & Spravato provides individualized TMS care designed to prioritize safety, comfort, and meaningful progress throughout your treatment journey.
Dr. Vines has practiced psychiatry in Arizona for for over 25 years and has experience working with diverse populations that include children, adolescents, adults, geriatrics, SMI patients, and the chemically dependent.
August 10, 2026
