Is psoriasis contagious?

Psoriasis is not contagious. It is an immune-mediated inflammatory condition driven by genetic predisposition and cannot be passed from person to person through skin contact. The visible nature of psoriasis plaques means many people worry about others' reactions, but education and awareness are the best tools for addressing stigma. Confidently correcting misconceptions when they arise can help reduce social anxiety associated with the condition.

What are the most common psoriasis triggers?

Triggers vary between individuals but commonly include: stress (one of the most consistent triggers); skin injury (cuts, sunburn, injections — known as the Koebner phenomenon); certain medications including lithium, beta-blockers, and antimalarials; infections, particularly streptococcal throat infections; alcohol; and in some people, specific foods. Identifying and managing personal triggers is a practical and impactful part of living with psoriasis, often complementing medical treatment.

Can diet affect psoriasis?

Dietary influence on psoriasis is an active area of research. Anti-inflammatory dietary patterns — particularly the Mediterranean diet — show emerging evidence for reducing psoriasis severity. Omega-3 fatty acids have anti-inflammatory properties relevant to psoriasis. Alcohol has a well-documented worsening effect on psoriasis. Weight management is significant — obesity is associated with more severe psoriasis and reduced response to treatment. Some people identify specific food triggers, though this varies considerably between individuals.

Does psoriasis affect more than the skin?

Yes. Psoriatic arthritis affects an estimated 30% of people with psoriasis, causing joint pain, swelling, and stiffness that can be debilitating if untreated. Psoriasis is also associated with increased risk of cardiovascular disease, metabolic syndrome, inflammatory bowel disease, and depression. The systemic inflammatory nature of the condition means that skin improvement does not necessarily mean all associated risks are addressed — a holistic approach to overall health is important alongside dermatological management.

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Psoriasis

Psoriasis is a chronic immune-mediated skin condition causing rapid skin cell turnover that produces scaling, red plaques, and inflammation. Anti-inflammatory nutrition, gut health, stress management, and topical natural

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Reviewed by Dr. Ciara Magee · Integrative Midwifery26 March 2026Emerging evidence

Quick answer

Do any of these feel familiar?

Psoriasis is most commonly experienced as raised, red, scaly patches of skin — known as plaques — that can be itchy, sore, or both
The scalp, elbows, knees, and lower back are among the most frequently affected areas, though psoriasis can develop anywhere on the body, including the nails
Many people describe cycles of flare and remission, with stress, infection, and certain medications among the most common triggers
The visible nature of the condition significantly impacts self-confidence, particularly in warmer months when skin is more exposed
Joint pain (psoriatic arthritis) develops in a significant proportion of people

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