Hormonal imbalances can contribute to hair loss in both men and women.

Genetics can increase the likelihood of hair loss in both genders.

Stress, illness, and childbirth may lead to temporary hair loss

Infections like ringworm can also result in hair loss.

Physical trauma such as burns, injuries, or exposure to X-rays can cause hair loss.

Autoimmune diseases, like alopecia areata, can trigger hair loss. In alopecia areata, the immune system mistakenly attacks the hair follicles. In most cases, hair regrows, though it may initially be finer or lighter in color before returning to its normal texture and shade.

Dietary factors, such as a low-protein or iron-deficient diet, or severely restricted calorie intake, can also cause temporary hair loss. Other subtle nutritional deficiencies might contribute to hair loss as well and should be considered.

Certain medical conditions, including thyroid disorders, lupus, diabetes, iron deficiency, eating disorders, and anemia, can lead to hair loss. Typically, when the underlying condition is treated, hair regrowth occurs unless scarring is involved, as in some types of lupus, lichen planus, or follicular disorders.

Medications, including chemotherapy drugs, blood thinners, beta-blockers for blood pressure, and birth control pills, can lead to temporary hair loss.

Cosmetic practices such as frequent shampooing, perms, bleaching, and hair dyeing can weaken and damage hair, leading to thinning. Tight braids, rollers, hot curlers, and combing through tight curls can also cause breakage. These practices generally do not cause permanent baldness, and hair typically regrows once the damaging habits are stopped. However, excessive damage to the hair or scalp can sometimes result in permanent bald patches.