Maybe you have been reading about TMS for weeks. Maybe someone you trust brought it up over coffee. Either way, one question sits heavier than the cost, the schedule, or the commute: does TMS change your personality? Will I still be me afterward?
Our care team hears this all the time, usually once the door closes and the conversation gets honest. The short answer: no, TMS does not change your personality. It treats mood, not temperament. The longer answer, and the reason it is worth reading, is below.
How TMS works on your brain
Transcranial magnetic stimulation (TMS) is a noninvasive form of brain stimulation that targets one small area of your brain while you are fully awake. Your clinician places an electromagnetic coil against your scalp, usually over the left prefrontal cortex, a region involved in mood regulation. The coil sends brief magnetic pulses through the skull, creating gentle electrical currents in the tissue just beneath it. According to the National Institute of Mental Health, the magnetic field is about the same strength as an MRI scanner. The field only goes a few centimeters deep, so TMS targets one cortical region rather than the whole brain.
If “brain treatment” brings up images of operating rooms or anesthesia, TMS will feel very different. You sit in a comfortable chair, talk or listen to music, and feel a light tapping on your scalp. When the session ends, you stand up and drive yourself home. No sedation, no recovery room, no altered state.
The U.S. Food and Drug Administration (FDA) classifies repetitive TMS systems as Class II medical devices, which means each device goes through a formal safety review before it can be used to treat depression. Curious what a session actually feels like? Our patient-experience guide walks through it minute by minute.
Personality, mood, and the third thing nobody separates
Personality, mood, and the habits depression builds up over time are three different things. The question “will TMS change who I am?” gets a lot clearer once you pull them apart.
Personality is the stable set of traits that make you recognizably you. A 2022 meta-analysis of 189 longitudinal studies found that people largely keep their rank ordering on core traits as they age, with consistency rising through adulthood. If you were more introverted than your friends at 25, you probably still are at 45. TMS does not change this.
Mood state is the low, anxious, or flat feeling that brought you here, and this is what TMS treats. It sits on top of who you are. It is not who you are.
The habits depression builds rarely get named. Cancelling plans. A short fuse. Going flat at dinner. Becoming the person who doesn’t come out anymore. After five or ten years, you and the people around you may have filed those patterns under “that’s just who I am.” They are not. They are what depression does to behavior over time.
When TMS lifts the mood state, the depression-shaped behavior starts to fade with it. What is left is the person who was there underneath.
The change also tends to hold. A 2025 durability study found that people who responded to accelerated TMS kept their improvement well beyond the treatment window, not a brief lift that fades after a few weeks.
What people describe changing after TMS
People notice a longer gap between something upsetting and their reaction. The email that would have ruined a morning lands, and there is a beat before the response. They finish a thought instead of losing it halfway. They stay in a conversation they would have quietly left a month earlier. In each case, the patience or focus was always yours. Depression had been draining it. For what tends to come back and in what order, see our piece on what recovery from treatment-resistant depression actually feels like.
The honest counter-case: some people feel briefly unlike themselves as their emotional range widens. If you have been numb for years, the return of feeling can register as strange before it registers as good. More intensity than you are used to, sometimes tears that show up without an obvious reason. This usually settles over a few weeks. It is not the treatment making you someone else, just a system that had been turned way down coming back to a normal volume.
If this happens, bring it to your care team: “My emotional range feels wider than I’m used to, and I want to talk through whether that’s expected.” It almost always is.
Is TMS safe? The fears worth taking seriously
Some worries are grounded, and you deserve straight answers about them.
- Cognitive safety. TMS does not dull memory or thinking. An NIMH-sponsored randomized trial found no adverse effects on cognition from TMS, and some people actually report clearer thinking as depression lifts, since the illness itself can blunt concentration.
- Seizure risk. This is the most serious potential side effect, and it is rare. A 2019 survey found 24 seizures across more than 300,000 sessions, a rate the reviewers described as extremely low. Pre-treatment screening is designed to lower that risk even further.
- Mood switch in bipolar-spectrum illness. Any antidepressant treatment carries some risk of tipping mood upward in people with bipolar disorder. Intake screening asks about it for exactly this reason.
One more thing worth mentioning. If your creative or professional life depends on emotional intensity, and you have wondered whether the lows are the price of the highs that fuel your work, bring that up during your consultation. Our clinicians have that conversation regularly. It is not awkward, and it is not a reason to stay untreated.
For who is and is not a candidate, and the full contraindication list, see our guide on whether you are a candidate for TMS.
What TMS actually changes, and what it leaves alone
TMS does not give you a new personality. It treats the mood state that has been shaping your behavior for years. What remains is the version of you that was there before the illness took hold.
In a 2024 randomized trial published in the American Journal of Psychiatry, TMS produced response in 37.5% of patients versus 14.6% for those who switched antidepressants, with remission at 27.1% versus 4.9%. Most of those patients had treatment-resistant depression and had already tried multiple medications without relief.
Nushama offers a standard 36-session course as well as Nushama ONE, a single-day accelerated protocol that delivers 20 intermittent theta burst stimulation (iTBS) sessions using the Ampa One device. This neuromodulation approach is based on Stanford’s SAINT protocol. Both formats target the same brain region and use the same core technology. The difference is scheduling, not mechanism. If the personality question is the one holding you back, put it first on the agenda. Book a free consultation and ask it before anything else.
FAQs
Will TMS change my personality?
No. TMS treats mood state, not personality. Core personality traits stay remarkably stable across a lifetime, and TMS acts on one region of the prefrontal cortex involved in mood regulation. What often shifts is the behavior that years of depression built up, such as withdrawal, irritability, and flatness, which can be mistaken for personality but is closer to a symptom lifting.
Will TMS make me feel like a different person?
Most people describe feeling more like themselves, not less. That said, if you have been emotionally numb for a long time, the return of feeling can seem unfamiliar at first and occasionally intense. This usually settles within a few weeks as your emotional range stabilizes. Mention it to your care team if it happens, since it is expected rather than a warning sign.
Does TMS affect memory or thinking?
TMS does not impair memory or cognition. Some people report clearer thinking as their depression improves, because depression itself interferes with concentration and recall. Unlike electroconvulsive therapy, TMS does not use anesthesia and does not carry the same memory-related side effects.
Is TMS safe, and what are the real risks?
TMS is FDA-cleared and regulated as a Class II medical device. The most serious risk, a seizure, is rare: one survey found 24 seizures across more than 300,000 sessions. For people with bipolar-spectrum illness, screening checks for the small risk of a mood switch. These risks are why medical screening comes before treatment.
Is TMS available as a non-medication depression treatment in Manhattan?
Yes. Nushama offers TMS in Manhattan for adults who have not found relief from antidepressants, including a standard 36-session course and Nushama ONE, a single-day accelerated option. TMS uses magnetic pulses rather than drugs, so it avoids systemic medication side effects. A consultation reviews your history and which format fits your situation.
