Hair loss can usually grow out, but if combined with seborrheic alopecia, it is difficult to grow out. The main reason for staying up late and losing hair is that staying up late for a long time can lead to mental stress, which can lead to endocrine disorders, and staying up late can cause the brain to be in a state of high tension for a long time, which can lead to poor blood circulation in the scalp. This situation generally does not lead to hair follicle shrinkage, most of the bad habits will be changed after staying up all night to grow hair again. However, if you stay up late and lose hair combined with seborrheic alopecia, generally can not grow back, this kind of hair loss and high androgen levels, mainly because of the body’s high levels of dihydrotestosterone, so that the hair follicle miniaturization, anagen phase of the hair gradually become thin, the growth cycle of the hair is shortened, and ultimately the hair follicle atrophy disappeared, the hair fall out. If you stay up late will make the symptoms of seborrheic alopecia even worse, this situation due to the disappearance of hair follicle atrophy, usually can not grow back. Hair loss should be changed to change the bad habits of staying up all night, usually to avoid too much mental stress, reduce perm hair coloring. If the hair loss is serious, you should consult a doctor in time to take the right treatment.