You started TMS therapy because you were ready for something to change. You committed to the appointments, showed up week after week, and trusted the process. Then, somewhere in those early weeks, something unexpected happened: you started feeling worse. Maybe your mood dropped lower than it had been in months. Maybe you felt more irritable, more fatigued, or more emotionally raw than you expected. And now you’re sitting with a difficult question: is this treatment actually helping, or is it making things worse?
What you may be experiencing has a name: the TMS dip. It’s a recognized, temporary pattern that many patients move through during the early weeks of Transcranial Magnetic Stimulation therapy, and it doesn’t mean the treatment is failing or that you made the wrong choice. For many patients, the dip is actually part of the brain’s adjustment process as it begins responding to stimulation and working toward a healthier baseline.
That said, we understand how disorienting it is to feel worse after choosing a treatment specifically designed to help you feel better. The confusion, the discouragement, and the temptation to stop altogether are all completely understandable. Here’s what the dip is, why it happens, when it typically ends, and how to tell a normal adjustment from something that needs clinical attention.
The TMS dip refers to a temporary period, most commonly occurring during weeks one through three of treatment, during which a patient’s depressive symptoms may intensify, feel more pronounced, or shift in unexpected ways before improvement begins. It’s not a formal diagnostic term, but it’s widely recognized among TMS clinicians and is discussed routinely in patient education because it’s common enough to warrant a name.
What does TMS feeling worse actually look like in practice? Patients describe it differently depending on their baseline symptoms, but some of the most frequently reported experiences include increased fatigue, heightened emotional sensitivity, a temporary return of low mood, irritability that feels out of proportion, and a general sense that the heaviness of depression has deepened rather than lifted. For some, it feels like taking two steps back at the exact moment they were hoping to take a step forward.
It’s not a side effect in the traditional medical sense, like a headache or nausea caused by a drug. It’s better understood as a neurological adjustment period. The brain is being exposed to repeated magnetic stimulation targeting the left dorsolateral prefrontal cortex, a region that is commonly underactive in depression. That stimulation is asking the brain to do something it has not been doing efficiently, and the initial response to that demand can be disorganized before it becomes organized and adaptive.
When someone begins physical therapy after an injury, the muscles being rehabilitated often feel sore and strained in the early sessions. That discomfort means the tissue is being engaged and asked to change. The TMS dip operates on a similar principle, though the tissue in question is neural circuitry rather than muscle fiber.
Clinicians have observed this pattern consistently enough that it has become part of the standard conversation during TMS intake and early-session check-ins. Patients are often warned that the first few weeks may feel bumpy, and that this bumpiness, while uncomfortable, is frequently a sign that the brain is responding to treatment. The operative phrase is “responding to treatment,” not “failing to respond.”
The dip can also manifest emotionally in ways that catch patients off guard. Someone who has been emotionally numb for months may suddenly find themselves crying more easily, feeling more reactive, or experiencing a flood of emotions they had not felt in a long time. While this can be distressing, it can also indicate that the brain’s emotional processing systems are beginning to come back online. Numbness lifting isn’t comfortable, but it’s often an early sign of progress.”
To understand why the TMS dip happens, it helps to understand what TMS is actually doing to the brain at a biological level. TMS works by delivering repetitive magnetic pulses through a coil placed on the scalp, targeting the left dorsolateral prefrontal cortex. This region plays a central role in mood regulation, executive function, and emotional processing. In people with depression, this area is frequently underactive, and TMS is designed to stimulate it back toward normal levels of activity.
Neuroplasticity refers to the brain’s ability to reorganize itself by forming new neural connections in response to experience or stimulation. It’s the mechanism that allows learning, recovery from injury, and behavioral change to happen at a biological level. TMS works by leveraging this capacity, using repeated stimulation to encourage the brain to build stronger, more efficient pathways in regions that have been underperforming.
The challenge is that neuroplasticity isn’t an instantaneous process. The brain doesn’t simply receive stimulation and immediately reorganize into a healthier pattern. Instead, it goes through a period of disruption before it reaches a new, more stable equilibrium. During that disruption phase, the existing neural patterns, which have often been entrenched for months or years in the case of chronic or treatment-resistant depression, are being challenged and destabilized. That destabilization can temporarily worsen how a person feels before the new, healthier patterns take hold.
There’s a useful parallel in psychiatric medication. When patients begin treatment with SSRIs or SNRIs, a well-documented phenomenon occurs in some individuals: symptoms can temporarily worsen during the first one to two weeks before the medication’s therapeutic effects emerge. The FDA and the National Institute of Mental Health have both addressed this in patient education materials, noting that increased anxiety or mood changes early in antidepressant treatment are possible and do not necessarily indicate that the medication is wrong for the patient. The TMS dip operates on a conceptually similar principle, though through a different mechanism.
With TMS, the magnetic pulses are stimulating relatively quiet neurons. Those neurons do not immediately fire in a clean, coordinated way. In the early sessions, the stimulation may create a kind of neurological noise before it creates signal. The brain’s regulatory systems, including the pathways that govern mood, sleep, and emotional reactivity, may temporarily become less stable as they are being pushed toward reorganization. This is why patients sometimes feel more emotionally volatile or fatigued in the first two weeks, even as the treatment is technically working.
Over time, with consistent stimulation across multiple sessions, the brain begins to consolidate the changes. The new neural pathways become more established, the prefrontal cortex becomes more reliably active, and the mood-regulating systems begin to function more smoothly. This is the point at which most patients start to notice the gradual lifting that TMS is known for. But getting there requires moving through the earlier, less comfortable phase first.
One of the most helpful things we can offer patients who are in the middle of the TMS dip is a general sense of the timeline. While every person’s experience is unique, there is a broad pattern that many patients follow, and knowing where you are in that arc can make the difficult early weeks more bearable.
Weeks one and two are typically when the TMS dip is most pronounced. This is when patients are most likely to report TMS feeling worse, with increased fatigue, emotional sensitivity, or a temporary deepening of depressive symptoms. The brain is receiving stimulation for the first time and is in its most disorganized early-response phase. Headaches at the treatment site are also more common in these early sessions, though they tend to diminish as the scalp and underlying tissue adjust.
Weeks three and four often represent a turning point. For many patients, this is when the acute intensity of the dip begins to ease. Mood may start to feel slightly more stable, even if real improvement hasn’t arrived yet. Some patients describe it as the weight becoming a little less heavy, or noticing small moments of relief that were not there before. This isn’t universal, and some patients do not notice a shift until later, but weeks three and four are frequently when the trajectory begins to change.
Weeks five and six are when many patients begin to experience more consistent, noticeable improvement. Sleep often improves before mood does. Energy levels may increase. Patients report being able to engage more easily with daily activities, feel more present in conversations, or notice that the persistent heaviness of depression has begun to lift in a way that feels real and sustained rather than fleeting.
This timeline is a general framework, not a guarantee. Factors that can influence when and how strongly the TMS dip appears include the severity and duration of the depression, prior medication history, whether the patient has treatment-resistant depression, and the specific TMS protocol being used. Some patients experience little to no dip at all and begin noticing improvement within the first two weeks. Others feel the dip more acutely and may not see meaningful change until after session twenty or beyond.
Neither experience predicts the outcome of treatment. A more intense dip doesn’t mean the treatment is failing, and an absence of a dip does not mean the treatment is working less effectively. The brain’s response to TMS is highly individual, which is one reason why close communication with your clinical team throughout the process matters so much.
The answer is nuanced. For the vast majority of patients, what feels like TMS making depression worse in the early weeks is the TMS dip: a temporary, neurologically explainable adjustment period. In rare cases, though, TMS may not be the right fit for a specific patient, and that is a different situation from the typical dip.
The TMS dip is characterized by a temporary intensification that typically eases by weeks three or four, as the brain adjusts and new neural patterns stabilize. It’s uncomfortable, but it has a trajectory. What falls outside the expected range looks different: worsening that doesn’t ease after week three, a complete absence of any response after a full course of treatment, or new symptoms that were not present before starting TMS.
There is one warning sign that always warrants immediate contact with your treatment provider, regardless of where you’re in the treatment timeline: new or intensifying thoughts of self-harm or suicide. This is a non-negotiable safety point. If you’re experiencing these thoughts, don’t hesitate to get in touch with your clinical team right away, or call or text 988 to reach the Suicide and Crisis Lifeline. The TMS dip doesn’t explain or justify an escalation in suicidal ideation, and this kind of symptom change requires prompt clinical attention.
Beyond that specific concern, other signs that go beyond a normal dip and deserve a conversation with your provider include severe anxiety that is new or substantially worse than your baseline, sleep disruption that keeps getting worse rather than stabilizing, or a sense that the treatment is creating new psychological distress rather than temporarily amplifying existing symptoms.
The good news is that TMS protocols are not fixed. If a patient’s response is outside the expected range, adjustments can often be made. Clinicians can modify the stimulation intensity, the coil placement, the session frequency, or the overall protocol. This is one reason why the relationship between patient and provider during TMS treatment is so important. The more openly you communicate about what you’re experiencing, the more your clinical team can respond appropriately and adapt the treatment if needed.
Staying quiet when something feels wrong is one of the most common and understandable mistakes patients make during this period. It can feel like complaining or admitting defeat, but it’s exactly the information your treatment team needs to help you.
Knowing that the TMS dip is temporary is helpful. Having concrete strategies for getting through it is even more helpful. The early weeks of TMS treatment are not the time to white-knuckle it alone. There are practical, evidence-informed ways to support your brain and your emotional wellbeing during this adjustment period.
Prioritize sleep consistency. The brain does the majority of its consolidation work during sleep, and this is especially true when it is undergoing active neurological change. Maintaining a consistent sleep and wake schedule, even on weekends, can support the brain’s ability to integrate the changes TMS is initiating. Disrupted sleep during the dip amplifies emotional sensitivity, so protect it deliberately.”
Keep your therapy or counseling appointments. If you’re seeing a therapist or counselor alongside TMS, do not let those appointments lapse during the dip. The emotional processing support that therapy provides is a valuable complement to the neurological work TMS is doing. The two approaches work well together, and having a space to talk through what you’re experiencing can reduce the sense of isolation that the dip can bring.
Track your mood daily. Using a simple journal or a mood-tracking app to record how you feel each day gives you and your clinical team something concrete to work with. The dip can feel monolithic when you’re inside it, but daily tracking often reveals subtle variations that are not obvious in the moment. It also helps distinguish between a temporary dip and a trend that needs clinical attention, which is important information for shared decision-making.
Avoid major life decisions during the adjustment period. The early weeks of TMS are not the ideal time to make significant changes in relationships, careers, or living situations. Your emotional baseline is in flux, and decisions made during a period of heightened sensitivity may not reflect your actual values and preferences once you’re through the dip.
Speak up with your provider. Telling your clinical team what you’re experiencing is one of the most important things you can do. Feeling worse after choosing a treatment is hard to sit with, and sharing that experience is the foundation of good collaborative care.
For patients who move through the TMS dip and continue their full course of treatment, the picture on the other side often looks very different from where they started. Improvement with TMS tends to be gradual rather than sudden, which can make it hard to notice in real time. Patients often describe looking back after several weeks and realizing how much has shifted, even if no single day felt like a dramatic turning point.
Common signs of improvement include better sleep quality, increased energy, a greater ability to engage in daily activities that previously felt overwhelming, and a reduction in the persistent heaviness that characterizes depression. Emotional reactivity often softens. Concentration and motivation, which are frequently impaired by depression, can begin to return. Many patients describe feeling more like themselves again, an outcome that matters more than any symptom score.
TMS isn’t an overnight solution, and a standard course of treatment typically involves 20 to 36 sessions delivered five days per week over four to six weeks. Some patients experience continued improvement in the weeks following their final session, as the neuroplastic changes the treatment initiated continue to consolidate. The end of the treatment course is not always the endpoint of the benefit.
For patients who respond well, maintenance TMS sessions are an option worth discussing with your provider. Periodic booster sessions after completing an initial course can help sustain the response over time, particularly for individuals with a history of recurrent or treatment-resistant depression. Integrated care, including ongoing psychiatric evaluation and medication management, can also support and extend the gains made during TMS treatment, creating a more comprehensive foundation for long-term wellbeing.
The path through treatment-resistant depression is rarely linear. But for many patients, the TMS dip is not the end of the story. It’s a chapter in the middle, one that requires patience and support to move through, but one that often precedes meaningful and lasting change.
If you are in the middle of TMS treatment right now and feeling discouraged, we want you to know that what you’re experiencing is real, it is recognized, and it doesn’t mean you are failing. The TMS dip is a documented, temporary phase that many patients move through on the way to genuine improvement. It’s uncomfortable, and the discomfort deserves to be taken seriously, but it’s not a signal to stop.
The most important thing you can do right now is stay in communication with your treatment team. Share what you’re feeling, ask your questions, and trust that your providers want to hear from you. You do not have to manage this period quietly or alone.
At Delray Brain Science, our team is here to support you through every stage of TMS treatment, including the harder early weeks. If you have questions about the TMS dip, about what to expect during your treatment, or about TMS itself, reach out.
Learn more about our services and contact us today to speak with our team about what to expect during TMS treatment. We are here to help you move forward.
