The mental weight of AS: depression, anxiety, and what helps

I want to talk about something that does not come up often enough in AS discussions: the mental health side of this.

Not because I think it is the most important thing — the physical reality of AS is real and often brutal. But because the mental health dimension gets quietly ignored in most clinical settings, and because I have met too many people who thought they were struggling because they were not coping well, when actually they were dealing with something that has a documented biological mechanism.

The numbers

More than one-third of people with axial spondyloarthritis experience anxiety or depressive symptoms. Some meta-analyses put it higher — up to 40-50% when including mild-to-moderate symptoms. That is roughly three times the rate in the general adult population.

This is not a fringe issue. It is one of the most common features of the disease. And it is almost never addressed in a standard rheumatology appointment, which focuses on joints, inflammation scores, and medication adjustments.

Why this happens — the inflammation-mood connection

This is the part that I think people most need to understand: depression in AS is not only a psychological reaction to having a painful chronic illness. There is also a direct biological mechanism.

The same inflammatory proteins that drive AS — specifically TNF-alpha, IL-6, and IL-17 — can cross into the brain and directly affect mood. TNF-alpha disrupts serotonin metabolism. IL-6 activates the brain's stress response system and is associated with fatigue, loss of motivation, and the kind of flat, empty feeling that characterises depression. IL-17 activates immune cells in the brain.

Your body is chronically inflamed. That inflammation is not just happening in your spine. It is happening everywhere, including in your nervous system.

The practical implication of this: when people start biologics and report that 'something lifted' — that their mood improved beyond what pain relief alone would explain — they are not imagining it. The biologic is addressing the inflammatory driver of the depression, not just the pain. The mood improvement is real and it has a mechanism.

The feedback loop

The relationship between inflammation and depression in AS runs in both directions. Inflammation drives depression. Depression increases inflammatory markers. Elevated inflammation worsens AS disease activity. Worsened disease activity deepens depression.

Pain worsens sleep. Sleep deprivation worsens pain and mood. Poor mood makes it harder to exercise. Less exercise worsens stiffness and pain. Around and around.

Understanding that you are in a loop is important because it means that intervening at any point in the loop can help. Better sleep helps pain and mood. Exercise helps mood and pain. Treating the inflammation helps sleep and mood. Getting support for the depression helps motivation to exercise.

The diagnostic delay makes it worse

The average person with AS spent 8-9 years being told their pain was imaginary, psychosomatic, or just stress. By the time they are diagnosed, many are already carrying significant psychological damage — not from the disease itself but from years of being dismissed.

Being told, repeatedly, by people in authority, that your very real experience is not real is psychologically harmful. Patients describe lying awake at night wondering if they are going crazy. Partners and family can start to doubt them. The cumulative effect on self-trust and confidence in the healthcare system is significant.

This is not weakness. This is what sustained disbelief does to people. Recognising the origin of some of the psychological weight you are carrying matters.

What actually helps

Cognitive Behavioural Therapy (CBT)

CBT has the strongest evidence base for depression and anxiety in chronic illness specifically. Unlike medication, it gives you tools — ways of identifying thought patterns that are making things harder, ways of sitting with pain without it consuming your whole world, and ways of finding meaning and engagement despite physical limitation.

CBT for chronic illness is not the same as CBT for general depression. Look for a therapist who has experience with long-term physical health conditions, or specifically with pain or arthritis.

Treating the disease

Counterintuitively, this might be the most important mental health intervention. Getting the inflammation under adequate control reduces the direct inflammatory driver of mood problems. If you are not on an adequate treatment and your disease is active, that is part of the picture.

Exercise

The evidence for exercise improving mood in AS specifically is good. It is not a replacement for treatment but it is a genuine contributor. Even modest amounts — a daily walk — have documented mood benefits.

Community

Finding other people who understand. The relief of being in a space — even an online one — where you do not have to explain what morning stiffness is, or justify why you cancelled plans, is real and significant. The AS communities on Reddit, Facebook, and patient organisation forums are genuinely valuable for this.

Being honest with your rheumatologist

Tell your rheumatologist how you are doing mentally, not just physically. They may not ask. You may need to raise it. But it is part of your disease management, not something separate, and a rheumatologist who understands AS knows that the mental health picture matters.

What I want to say directly

If you are struggling with depression or anxiety alongside AS, you are not being dramatic. You are dealing with a condition that directly affects mood through biological mechanisms, that comes with an enormous emotional weight from the diagnostic journey, and that changes your daily life in ways that are genuinely hard to adapt to.

Getting help with the mental health side of this is not giving up on the physical side. It is treating the whole disease.