Keratosis (from: keratinocyte, the prominent cell type in the epidermis and -osis, abnormal) a growth of keratin on the skin. More specifically, it can refer to:
- actinic keratosis (also known as solar keratosis)
- hydrocarbon keratosis
- keratosis pilaris (KP), also known as (follicular keratosis)
- seborrheic keratosis