Hair thinning and softening may be due to a variety of reasons such as genetic factors, disease factors, physical and chemical stimuli, etc. It is recommended that the cause of the conditioning treatment. 1. Hereditary factors: If the parents’ hair is thin and soft, the offspring will be affected and the hair will gradually become thin and soft, which is relatively common in the clinic. 2. Disease factors: seborrheic alopecia is one of the reasons affecting the quality of hair, mostly seen in men, especially in adults prone to hair loss, and gradually from the top of the head, called androgenetic alopecia, starting from the top of the head to the surrounding gradually lose hair, hair gradually thinning and soft. 3. Physical and chemical stimulation: some patients are due to frequent hair coloring, perming, etc., which causes physical damage to the hair and affects the hair quality. If there is a phenomenon of hair thinning and softening, it is recommended to choose a regular hospital treatment, clear diagnosis and treatment methods, usually more scientific hair care, to avoid stimulation of the hair.