Alopecia celsi, commonly known as alopecia areata or spot baldness, is a disorder that causes hair loss in one or more body parts. It frequently leads to several coin-sized bald patches on the scalp. Psychological stress and disease are potential causes of alopecia celsi in at-risk people, although, in most instances, there is no evident reason. Furthermore, alopecia celsi is thought to be an autoimmune illness caused by a break in the immunological privilege of the hair follicles.