What psoriasis actually is
Psoriasis is a chronic, immune-mediated condition in which skin cells multiply far faster than normal. Instead of shedding gradually, they pile up on the surface, forming raised, scaly patches. It's not contagious and it's not caused by poor hygiene. It's an inflammatory condition that can affect the skin, nails, and sometimes the joints.
Recognising the signs
Psoriasis takes several forms, but plaque psoriasis is by far the most common.
- Raised patches (plaques) with silvery-white scale, often on elbows, knees, scalp, and lower back
- Patches that may itch, burn, or feel sore
- Pitting, thickening, or discolouration of the nails
- Joint pain or stiffness, which can signal psoriatic arthritis and needs medical assessment
It's more than skin deep
Psoriasis is linked to higher risks of joint disease, cardiovascular conditions, and low mood. Treating it is about overall health, not just appearance.
Common triggers
- Stress
- Skin injury, such as cuts, sunburn, or scratches (the Koebner phenomenon)
- Infections, particularly strep throat
- Cold, dry weather
- Smoking and heavy alcohol use
- Certain medications, which is why you should tell any doctor you have psoriasis
Treatment options
Treatment depends on how severe the condition is and where it appears. Approaches range from topical therapies to light therapy and, for moderate-to-severe disease, systemic and biologic medications prescribed and monitored by a specialist.
- Topical treatments and medicated moisturisers for mild, localised plaques
- Phototherapy (controlled UV light) delivered under medical supervision
- Systemic or biologic medications for widespread or stubborn disease, always specialist-managed
- Lifestyle steps: not smoking, moderating alcohol, managing weight and stress
All prescription psoriasis treatments require a clinician's assessment and ongoing monitoring. Doses and combinations are tailored to you, so never copy someone else's regimen or use leftover medication.
Seek urgent care
A rare severe form called erythrodermic psoriasis can cause widespread redness, peeling, and problems regulating body temperature. If most of your skin becomes intensely red and painful with fever or feeling very unwell, seek emergency care: call 911 (US/CA), 999 (UK), or 112 (EU).
Because psoriasis is long-term and individual, ongoing care matters. On iHealix you can consult a verified dermatologist or doctor online to confirm what you're dealing with, build a treatment plan, and get referred onward for specialist therapies if needed.