There are many possible reasons why someone may lose their hair. Hair loss can be due to a variety of medical conditions, medications, and other lifestyle factors. Some of the most common causes of hair loss include genetics, stress, hormonal imbalances, certain medications, and certain medical conditions such as thyroid disease, alopecia areata, and lupus. In some cases, hair loss may be due to a combination of multiple factors. In addition, improper hair care and styling can lead to hair loss or thinning.
For example, frequently pulling the hair too tightly or using harsh chemical dyes and styling products can damage the hair follicles, leading to hair loss.