Chronic Pain and Depression: How TMS Therapy and Ketamine Can Help
Chronic pain and depression often reinforce each other — but there are newer, brain-targeted options.
Below is the “at a glance” version of what this article covers (why they’re linked + how TMS and ketamine may help).
Why they’re connected
- Shared brain circuits that process emotion + pain
- Overlapping neurotransmitters (serotonin, dopamine, glutamate, etc.)
- Inflammation can increase risk and symptom severity
What TMS may do
- Noninvasive magnetic pulses to influence targeted networks
- May reduce “central sensitization” (overactive pain signaling)
- Typically builds gradually across multiple sessions
What ketamine may do
- Works on NMDA/glutamate pathways tied to mood + pain processing
- Can support neuroplasticity (new “routes” in the brain)
- Must be medically supervised due to misuse potential
If you live with chronic pain, it’s not unusual to struggle with your mood, too. Chronic pain and depression often occur together, and their impact can extend well beyond physical discomfort or emotional strain.
In this blog, we’ll look at why the link between chronic pain and depression exists and how treatments like TMS and ketamine are offering patients new options when more traditional therapies fall short.
What Connects Chronic Pain and Depression in the Brain?
Chronic pain often reflects changes within the central nervous system, where pain becomes encoded in brain circuits rather than solely in injured joints or nerves. This is one reason why chronic pain can persist long after a physical injury has healed, and why it so often affects mood.
Research shows that several brain regions involved in processing emotion also play a role in pain. These include the prefrontal cortex, amygdala, anterior cingulate cortex (ACC), insula, hippocampus, and thalamus. All of these areas help regulate attention, emotion, memory, and the interpretation of sensory input. When pain becomes chronic, activity within these regions can shift.
Neurotransmitter systems also overlap. Studies demonstrate that serotonin, norepinephrine, dopamine, and glutamate (which influence mood, motivation, and emotional regulation) are the very same chemical messengers involved in how the brain interprets and amplifies pain signals. Meanwhile, changes in brain-derived neurotrophic factor (BDNF) and other neuroplasticity-related markers can alter how these networks communicate over time.
Inflammation adds yet another connection point. Studies show that pain in multiple body sites increases depression risk, partly explained by inflammatory blood markers like C-reactive protein.
Taken together, these overlapping neural, biochemical, and inflammatory pathways help explain why chronic pain and depression so frequently appear side by side.
The Real-World Impact of Chronic Pain and Depression
The overlap between pain and mood disorders is common, and it has real consequences for everyday life. A large worldwide analysis found that roughly 40% of people with chronic pain experience clinically significant depression or anxiety, with women, younger adults, and people with fibromyalgia facing the highest risk.
In the United States alone, an estimated 12 million adults live with both chronic pain and anxiety and/or depression symptoms at the same time.
People with both chronic pain and depression are more likely to miss work, struggle with errands, and reduce social participation, leading to a measurable drop in quality of life and daily functioning. That’s why experts consider this overlap a growing public health concern rather than just a clinical curiosity.
Why this overlap matters (in real life)
When pain and mood symptoms stack, daily functioning, sleep, relationships, and work are often hit hardest.
Standard Treatments Don’t Always Break the Cycle of Chronic Pain and Depression
Chronic pain and depression are typically treated with a mix of medications and behavioral strategies. Depending on the person, that might include antidepressants, opioids, anticonvulsants, psychotherapy (especially CBT), and structured physical activity. These approaches can certainly help, but they don’t work for everyone.
Up to 60% of people with chronic pain report limited benefit from standard medications, and many also struggle with side effects like fatigue or cognitive changes. On top of that, individuals with both chronic pain and depression are often excluded from clinical trials and specialty pain programs, leaving major gaps in care. This mismatch between patient needs and available solutions has pushed researchers to explore brain-targeted therapies like TMS and ketamine.
How Transcranial Magnetic Stimulation Helps Chronic Pain and Depression
Supervision & Safety
Transcranial magnetic stimulation (often referred to as TMS) is a noninvasive, drug-free procedure that uses magnetic pulses to stimulate specific regions of the brain. It’s FDA-approved for depression and obsessive–compulsive disorder, and researchers are now studying how it might also help people living with chronic pain.
By influencing electrical activity in neural circuits linked to pain and mood, TMS may help “reset” overactive pain networks and reduce central sensitization (the heightened sensitivity that makes everyday sensations feel painful).
Studies show benefits for conditions like fibromyalgia, neuropathic pain, complex regional pain syndrome (CRPS), and migraines. One case report even documented two patients with chronic low back pain, depression, and insomnia who experienced reduced pain, improved sleep, and better mood after three to four weeks of daily repetitive TMS. These effects lasted roughly three months with minimal side effects.
Practically speaking, TMS isn’t a one-and-done treatment. It typically involves multiple sessions over several weeks. It tends to be well-tolerated, and often provides incremental, cumulative relief rather than instant results.
Ketamine’s Dual Role in Treating Chronic Pain and Depression
In recent years, ketamine has emerged as an FDA-approved option for treatment-resistant depression. But it works differently from standard antidepressants.
Ketamine blocks NMDA receptors and influences glutamate signaling, a key player in neuroplasticity, pain processing, and mood regulation. By shifting these pathways, ketamine may help recalibrate how the brain interprets both emotional distress and physical pain.
The clinical evidence is compelling. In a prospective cohort of 329 adults with refractory chronic pain, repeated ketamine treatments over one year reduced pain, depression, and anxiety while also improving quality of life. The study concluded that ketamine may reduce pain partly by treating the mood disorder that travels alongside it.
Ketamine does, however, carry potential for misuse, which is why it should only be used within a comprehensive treatment plan, at the lowest effective dose, and under the supervision of trained professionals.
For select patients, ketamine is a promising depression treatment that can also address chronic pain, rather than trying to chip away at each condition in isolation.
Is TMS or Ketamine Right for You?
Choosing between TMS and ketamine is a conversation to have with a qualified specialist who understands both chronic pain and mood disorders. TMS may appeal to people looking for a noninvasive, drug-free approach, while ketamine is often considered when depression is severe, treatment-resistant, and intertwined with chronic pain.
In practice, a combination of interventions may be best for you. Many patients benefit from a broader plan that may include physical therapy, CBT or other psychotherapy, lifestyle changes, and support for sleep and stress management.
How to Move Forward When You’re Dealing with Chronic Pain and Depression
Living with chronic pain and depression can feel like a double burden, but you’re not alone. You’re also not without options. These conditions often show up together, and while that makes the journey more complex, it also means there are treatments designed to address both. Many people with chronic pain still lead meaningful, connected, and fulfilling lives.
TMS & Ketamine Clinic of SW Florida is a leading provider of both TMS therapy and IV ketamine infusions. We serve residents in Fort Myers and the surrounding areas throughout Southwest Florida.
If you’re looking for a team that can support you in finding relief from chronic pain and depression, we are here to help.
Contact us today.
Frequently Asked Questions
FAQ: Chronic pain, depression, TMS, and ketamine
Quick answers to common questions patients ask when pain and mood symptoms overlap.
Can TMS help with chronic pain, or only depression?
How many TMS sessions are typical?
How does ketamine support both mood and pain?
Is ketamine safe? What about misuse risk?
Can TMS and ketamine be used together?
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