There are many causes of hair loss, both temporary and permanent. Some of the most common causes include:

• Androgenetic alopecia (AGA), also known as male-pattern baldness or female-pattern baldness, is the most common cause of hair loss in both men and women. It is a genetic condition that is caused by a combination of factors, including hormones, genetics, and aging.
• Telogen effluvium is a type of hair loss that is caused by a stressful event, such as surgery, childbirth, a serious illness, or a major diet change. It is usually temporary, and the hair will grow back once the stressor is gone.
• Alopecia areata is an autoimmune disorder that causes hair to fall out in round patches. It can be temporary or permanent, and there is no cure.
• Thyroid problems, such as hypothyroidism and hyperthyroidism, can cause hair loss.
• Medications, such as chemotherapy drugs, blood thinners, and lithium, can cause hair loss as a side effect.
• Nutritional deficiencies, such as iron deficiency, can cause hair loss.
• Physical trauma, such as burns or scalp injuries, can cause hair loss.

If you are experiencing hair loss, it is important to see a doctor to determine the cause. There are many treatments available for hair loss, depending on the cause.