Hair loss

Hair loss, also known as alopecia or baldness, refers to a loss of hair from the head or body. Baldness can refer to general hair loss or male pattern hair loss.

Hair loss and hypotrichosis have many causes including androgenetic alopecia, fungal infection, trauma (e.g., due to (trichotillomania), radiotherapy, chemotherapy, nutritional deficiencies (e.g., iron deficiency), and autoimmune diseases (e.g., alopecia areata). Hair loss severity occurs across a spectrum with extreme examples including alopecia totalis (total loss of hair on the head) and alopecia universalis (total loss of all hair on the head and body).