Depression and the Body: How Low Mood Manifests Physically
Back pain, fatigue, and digestive issues — these could all be symptoms of depression. How your body signals a mental health condition and why doctors often miss it.
You've come to the doctor again with pain. The third specialist in six months. Tests are normal, ultrasound is clear. "Functional disorder," "autonomic dysfunction," "let's monitor it." But the pain doesn't go away. You're tired. And truly tired — so much so that it's hard to get out of bed.
Perhaps it's depression. Not just "feeling down" — but depression that speaks the language of the body.
1. Neurobiology: Why Depression Hurts
Depression is not only a psychological process but also a systemic inflammatory one. In depression, levels of pro-inflammatory cytokines (IL-6, TNF-alpha, C-reactive protein) increase. This inflammation is real — and it causes physical symptoms: fatigue, pain, digestive issues, immune changes.
Serotonin deficiency in depression also directly affects pain sensitivity: serotonin is involved in pain modulation. Less serotonin → lower pain threshold → pain is perceived more acutely.
2. Most Common Physical Symptoms of Depression
- Chronic fatigue — not just "wanting to sleep," but deep physical exhaustion that doesn't improve with rest
- Back and neck pain — one of the most common somatic symptoms
- Headaches — tension-type and migraine-like
- Gastrointestinal problems — nausea, constipation, irritable bowel syndrome (IBS)
- Appetite and weight disturbances
- Chest pain — after ruling out a cardiac cause
- Reduced immunity — frequent ARVIs, slow healing
- Libido disturbances
3. Masked (Somatic) Depression
This is a distinct type of depression where physical symptoms dominate, and psychological symptoms are minimal. The classic "I'm sad" might not be present at all. The person says: "I'm not depressed, my back hurts."
There are many such patients: according to various data, 30 to 50% of people with depression in primary care present specifically with somatic complaints.
4. How to Tell if Pain is Related to Depression
Signs that somatic symptoms might be depressive:
- Pain wanders or shifts location
- Tests and examinations are normal
- Symptoms are worse in the morning
- There are sleep and appetite disturbances
- There was a psychologically traumatic event shortly before the symptoms appeared
- Antidepressants (especially SNRIs, duloxetine) alleviate the pain
5. Treatment: What Helps the Body with Depression
- Antidepressants — especially SNRIs (duloxetine, venlafaxine), which have a proven analgesic effect
- Psychotherapy — CBT reduces pain perception
- Physical activity — reduces neuroinflammation
- Body-oriented practices — yoga, body-oriented therapy
Talk to our AI psychologist psybot.app. Read also: Symptoms of Depression.