The forehead and the top of the head are most prone to hair loss, which may be caused by hair loss genes, hair style reasons, and improper cleansing. 1. Hair loss genes: Hair follicles on the forehead and top of the head are more susceptible to the effects of dihydrotestosterone compared to other places, and the cells on the top of the head lose their vitality, and they will gradually fall off. 2. Hair style reasons: women tie their hair too tightly, resulting in greater tension on the forehead scalp, over time, the firmness of the forehead hair is damaged, it will fall off. 3. Improper cleansing: Nowadays, everyone will choose to wash their face with cleansing products such as facial cleanser, which is applied to the hairline when applying, and cleaned when cleaning is not in place, and in the long run, the chemical products will also stimulate the hair follicles to cause hair loss. Hair loss, although not much impact on the body, but affects the external image of the individual, it is recommended to go to the hospital in a timely manner, under the guidance of the physician, choose the appropriate way to improve as soon as possible.