Can Psoriatic Arthritis Cause Heavy Sweating?

Psoriatic arthritis (PsA) is best known for causing joint pain, stiffness and fatigue, but some people living with it also experience heavy sweating. 

While sweating isn’t one of the usual textbook symptoms, there are several plausible reasons why it can happen. 

Below, we explore the possible causes and offer guidance, followed by helpful UK resources for further support.

Why Heavy Sweating Might Occur with PsA

Inflammation & Elevated Body Temperature

Psoriatic arthritis is an inflammatory autoimmune condition, meaning your immune system may attack healthy tissue. During flare-ups, the body releases inflammatory mediators (e.g. cytokines) that can raise your internal temperature. This increase can contribute to excessive sweating, even when you’re not exerting yourself.

Pain, Discomfort & Stress Response

Persistent pain or discomfort can trigger the body’s sympathetic (fight-or-flight) system, which may lead to sweating. Anxiety and stress around flare-ups, mobility and daily functioning can amplify this effect.

Side Effects from Medications

Some medications used in managing PsA may cause hot flushes, night sweats or increased sweating as side effects. Examples include:

Corticosteroids (steroids)

Some biologic therapies

Occasional reactions to NSAIDs or pain medications

If the sweating began shortly after starting a new medication, it’s worth discussing with your healthcare team.

Night Sweats & Low-Grade Fever

Active PsA sometimes involves low-grade systemic inflammation, which can trigger night sweats or mild fevers. These effects are more likely when inflammation is more widespread or when the immune system is battling an infection (especially in people on immunosuppressive treatment).

Coexisting Conditions

Because autoimmune diseases can cluster, someone with PsA may also develop thyroid disorders (e.g. hyperthyroidism) or other conditions that independently lead to excess sweating, heat intolerance or metabolic changes. It’s always wise to explore whether other causes are at play.

When to Seek Medical Advice

You should talk to your GP or rheumatologist if:

Heavy sweating is new or getting worse

It comes with fever, chills, weight loss or other unexplained symptoms

It disrupts your sleep, comfort or daily life

It began after starting or changing a treatment

Your healthcare team may assess for infections, check your thyroid function, or adjust medications as needed.

Tips to Stay Comfortable

While you and your clinician explore possible causes, these practical tips may help:

Wear breathable, moisture-wicking fabrics (e.g. cotton, technical fabrics)

Keep your bedroom cool, use light bedding

Stay well hydrated, especially during flare-ups

Try stress-management techniques (deep breathing, mindfulness, gentle stretching)

Limit caffeine, alcohol, and spicy foods if these seem to trigger sweating.

Resources:-

NHS – Psoriatic Arthritis / Psoriasis Authoritative NHS pages covering symptoms, diagnosis, treatment and living advice. https://www.nhs.uk/conditions/psoriatic-arthritis

Versus Arthritis/Arthritis UK Comprehensive information, downloadable booklets, helpline support, guidance on living with arthritis https://www.arthritis-uk.org

Helpline: 0800 5200 520 

The Psoriasis Association Support for people with psoriasis and psoriatic arthritis; helpline; information leaflets; video resources psoriasis-association.org.uk

01604 251 620 

PAPAA (Psoriasis and Psoriatic Arthritis Alliance) Patient-centred support, treatment guides, symptom checkers, advocacy in the UK papaa.org