What does psoriasis look like? What are the symptoms and signs?
Psoriasis typically looks like red or pink areas of thickened, raised, and dry
skin. It classically affects areas over the elbows, knees, and scalp.
Essentially any body area may be involved. It tends to be more common in areas
of trauma, repeat rubbing, use, or abrasions.
Psoriasis has many different appearances. It may be small flattened bumps,
large thick plaques of raised skin, red patches, and pink mildly dry skin to big
flakes of dry skin that flake off.
There are several different types of psoriasis, including psoriasis vulgaris
(common type), guttate psoriasis (small, drop like spots), inverse psoriasis (in
the folds like of the underarms, navel, and buttocks), and pustular psoriasis
(pus-filled, yellowish, small blisters). When the palms and the soles are involved, this is known as palmoplantar psoriasis.
Sometimes pulling of one of these small dry white flakes of skin causes a
tiny blood spot on the skin. This is medically referred to as a special
diagnostic sign in psoriasis called the Auspitz sign.
Genital lesions, especially on the head of the penis, are common. Psoriasis in
moist areas like the navel or area between the buttocks (intergluteal folds) may
look like flat red patches. These atypical appearances may be confused with
other skin conditions like fungal infections, yeast infections, skin irritation,
or bacterial Staph infections.
On the nails, it can look like very small pits (pinpoint depressions or white
spots on the nail) or as larger yellowish-brown separations of the nail bed
called "oil spots." Nail psoriasis may be confused with and incorrectly
diagnosed as a fungal nail infection.
On the scalp, it may look like severe dandruff with dry flakes and red areas
of skin. It may be difficult to tell the difference between scalp psoriasis and
seborrhea (dandruff). However, the treatment is often very similar for both
conditions.