Excess androgens, or male sex hormones, and hormonal imbalances are the most common cause of hair loss such as androgenetic alopecia

Other types of hormone-related conditions may also contribute to hair loss. Some may involve thyroid hormones.

Other hormonal imbalances can also lead to hair loss, especially the wildly fluctuating hormones that happen following pregnancy and childbirth.

According to the American Hair Loss Association, hair loss is a side effect of a number of medications taken for common health problems. This is also known as “drug-induced hair loss.”

Alopecia is the medical term for hair loss, and alopecia areata describes an autoimmune condition in which your immune system attacks and destroys your hair follicles, inhibiting the growth of new hair.

Alopecia areata is just one of many types of autoimmune diseases that can cause hair loss.

When your body is under serious physical stress, the natural cycle of hair growth and rest can be disrupted, resulting in hair loss, often in the form of thinning hair — your hair may even come out in clumps.

Hair loss can be triggered by an intense amount of stress, such as developing an illness or undergoing surgery that puts stress on the body and mind

While stress is often a short-term cause of hair loss, severe stress or anxiety may be associated with hair-pulling disorder, or trichotillomania.

Deficiencies in certain vitamins and minerals can lead to hair loss and diminished hair growth because they aid in the hair growth cycle and cellular turnover