The chronic, recurring nature of seborrhoeic dermatitis which causes redness on the face with or without scales and/or dandruff is a significant source of discomfort for affected people. This discomfort is both social and functional (itching, burning sensations, etc.).
What are the signs of psoriasis?
Psoriasis is a chronic, non-contagious skin condition that affects 2 to 3% of the population. It may appear at any age. Specific triggering factors can reveal a genetically predisposed profile and cause lesions to appear.
Psoriasis patches are red (erythematous) and covered with thick whitish scales. They are very clearly defined compared to healthy skin.
The areas most traditionally affected are the elbows and knees (areas that are impacted by microtraumas), but any part of the tegument may be affected. The scalp is one area frequently impacted (particularly the occipital area). When psoriasis reaches the skin folds (groin, armpits, etc.), this is called inverse psoriasis, which is much less scaly. The nails are sometimes affected as well in various ways (thickening, pitting, deformations).