According to the growth pattern of hair, it is normal to lose less than 100 hairs per day. There is no accurate clinical value of how wide the hair slit is considered hair loss. If you feel that your hair is thinner than before and more dewy, you need to be alert, and you can go to a professional dermatologist to test the hair growth condition to determine whether hair loss is occurring. If hair loss occurs, in addition to the hair slit will become wider, may also appear scalp, hair greasy symptoms, at this time, careful observation of the hair, may appear oily state, some patients may also appear hair luster dull, hair withering, may also appear yellowish scales or gray scales flying, accompanied by itching and other situations. In addition, the number of hair loss per day is high, usually more than 100, and the hairline and sideburns may also appear to move up due to thinning hair. When hair loss symptoms occur, patients need to go to the hospital to identify the cause and treat the cause. If the hair loss is caused by disease, the original disease needs to be actively treated and the hair seam will be narrowed again after the body recovers. If the hair loss is triggered by factors such as pulling, it needs to be relieved by changing the hairstyle and other means. At the same time, we should pay attention to the fact that in daily life, we should try not to use more stimulating shampoos, dyeing and perming products, etc., so as not to aggravate the symptoms of hair loss. Usually, you should pay attention to a light diet, eat less greasy and spicy stimulating food, regular work and rest, and ensure sufficient sleep.