Whether hair can grow out again after hair loss mainly depends on the cause of hair loss, hair loss can generally be divided into two kinds of physiological hair loss and pathological hair loss, physiological hair loss can generally grow out again after eliminating the triggering factors, while pathological hair loss may cause serious damage to the hair follicles, and it is generally more difficult to grow out after hair loss. 1, physiological hair loss: physiological hair loss generally includes high mental stress, endocrine disorders, the Patients with this kind of hair loss can be treated in time, and after persistent and uninterrupted treatment, the hair may also grow out again after eliminating individual triggers in general; 2, pathological hair loss: pathological hair loss generally includes hair loss caused by flat moss, lupus erythematosus, alopecia areata folliculitis, etc. In general, when this phenomenon occurs, most of the hair follicles in the scalp area have If you want your hair to grow again, it may be difficult. It is recommended that patients who have hair loss symptoms should go to the hospital in time to find out the specific cause of hair loss and carry out symptomatic treatment according to the cause in order to make the hair grow out again. And life should also pay attention to adjust the diet, try not to eat spicy and stimulating food, can eat more fresh vegetables, fruits, fish, etc., usually wash care is recommended to shampoo foam before applying to the scalp to wash hair, to prevent shampoo on the scalp stimulation, and lead to hair loss.