What Is Psoriasis? Symptoms, Triggers and Treatment
PSORIASIS GUIDE
Psoriasis is more than scaly plaques on elbows and knees. It may affect scalp, nails, flexures and joints, and severity is not judged only by surface area.
What is psoriasis?
Psoriasis is a chronic, immune-mediated inflammatory disease with flares and quieter periods. It is not contagious. Plaque psoriasis is common, while guttate, flexural, pustular and erythrodermic patterns require different assessment.
Possible signs
Skin plaques
Well-defined inflamed scaly areas are common; colour can look purple or dark brown in darker skin.
Scalp involvement
Thicker, defined scale may extend beyond the hairline and itch.
Nail change
Pitting, thickening, lifting or colour change may occur and can resemble fungal disease.
Joint symptoms
Morning stiffness, swelling, finger pain or heel pain should be assessed for psoriatic arthritis.
What may influence flares?
Infection, stress, skin injury, some medicines, smoking, heavy alcohol use and abrupt treatment withdrawal may contribute in some people. Triggers are individual and should be explored through history rather than broad assumptions.
Widespread redness, fever, systemic illness or numerous pus-filled lesions can require urgent assessment. New joint symptoms should also not be delayed.
How is psoriasis assessed?
Diagnosis is usually clinical, with biopsy considered when necessary. Extent, high-impact sites, quality of life, nails and joints are assessed. Cardiovascular and metabolic risk may also be reviewed within general healthcare.
How is treatment selected?
- Site-appropriate topical therapy and moisturising may suit limited disease.
- Phototherapy or systemic treatment may be considered according to extent, site and quality-of-life impact.
- Nail, scalp and flexural disease require adapted formulations.
- Joint symptoms may require rheumatology collaboration.
- Response and safety are monitored at follow-up.
Daily life and monitoring
- Avoid picking plaques and minimise trauma.
- Continue moisturising as supportive care.
- Seek support for smoking or heavy alcohol use.
- Do not neglect weight, blood pressure and metabolic health.
- Report joint stiffness, swelling and nail change.
Note: There is no single “permanent cure” or universal product. Choice depends on type, severity, associated conditions and the person’s circumstances.
When should you see a dermatologist?
New or widespread plaques, scalp or nail disease, quality-of-life impact or joint symptoms warrant assessment. See psoriasis care.
Frequently Asked Questions
Answers about contagion, chronicity, diet and joints.
1Is psoriasis contagious?
No. It does not spread by touch or shared items.
2Can psoriasis disappear permanently?
It is chronic; long clear periods are possible, but a tendency to flare may remain.
3Is psoriasis a fungal infection?
No. Nail and flexural psoriasis can nevertheless resemble fungal disease.
4Does diet affect psoriasis?
There is no universal miracle diet. Balanced nutrition and metabolic health support overall care.
5Can psoriasis affect joints?
Yes, some people develop psoriatic arthritis. New pain, swelling or morning stiffness should be reported.