Hair loss is typically a result of genetics, a medical condition, or a hormonal change or imbalance. The most common cause of hair loss is hereditary hair loss, which typically occurs or worsens as you age. Hereditary hair loss in men is also called male pattern baldness or by its medical name, androgenetic alopecia. For men, the first sign of male pattern hair loss may be a receding hairline or bald spot. Hair loss can also be caused by several medical conditions, including alopecia areata, telogen effluvium and trichotillomania, fungal infections, iron deficiency, certain thyroid issues, and even rapid weight loss. Alopecia areata causes the body’s immune system to attack its own hair follicles. This type of hair loss may be temporary or may need treatment if hair does not grow back. Stress, severe illness, or another traumatic event can cause a temporary hair loss condition called telogen effluvium. Typically, after the stress or shock is reduced, the hair will grow back. Trichotillomania is characterized by compulsive hair-pulling. This condition will last until sufficient mental health treatment is received. Hair loss can also be caused by certain medications and treatments, such as cancer treatment. Additionally, tight hairstyles like braids or ponytails can lead to scalp hair shedding. Hair loss can be treated with medication, therapy, or a combination, but determining the cause of your hair loss is the first step. If you are experiencing new or worsening hair loss, see your doctor or connect to a medical provider through the Hims platform.