Scalp psoriasis: When psoriasis forms on the scalp, it can creep beyond the scalp. Scalp psoriasis: Overview Psoriasis (sore-EYE-ah-sis) can appear anywhere on the skin. When it forms on the scalp, it is often called scalp psoriasis. Scalp psoriasis can extend beyond the scalp. It can appear on

  Alopecia areata: This disease causes hair loss and often occurs in otherwise healthy people. Alopecia areata: Overview Alopecia (al-oh-PEE-shah) means hair loss. When a person has a medical condition called alopecia areata (ar-ee-AH-tah), the hair falls out in round patches. The hair can fall out