Appearance of bald patches on the scalp or thinning of hair is referred to as hair loss. There are several reasons that may cause hair loss, including genetics, stress, illness, diet, compulsive pulling of hair, tight braids or ponytails, and use of hot hair irons can result in hair loss. In certain cases, iron deficiency may result in loss of hair. Some women may experience hair fall after giving birth.

Hereditary thinning of hair is one of the most common causes of hair loss, affecting both men and women. A receding hair line and appearance of bald patches are common symptoms of the condition. Alopecia areata, an autoimmune condition, is another possible reason in which an individual may lose hair. Certain illnesses, ringworm, and some cancer treatments also result in loss of hair.