Most of the time a dermatologist can determine whether a person has psoriasis by asking questions and making basic observations. A skin biopsy can be requested if there is any doubt.
Psoriasis might be confused with seborrheic dermatitis and other forms of dermatitis or eczema (general name for skin irritations), which are similar both in appearance and cause.
Psoriasis indicators:
- Well defined skin lesions.
- Affected areas showing primarily on the elbows, scalp, knees and torso.
- A family history of psoriasis.
- Pitted finger and toenails.
- Swelled, arthritic joints (this would be psoriatic arthritis).
- Silver colored, small scales.
- Dryness.
- Itchiness.
- Swollen, irritated skin.
