As the pace of life continues to accelerate, young people work and study under increasing pressure, young people often can not guarantee sufficient sleep, can not guarantee a regular life. As a result, more and more young people are suffering from hair loss, and it is often seen that a part of men less than 30 years old have “Mediterranean” head. This kind of hair loss is called “seborrheic alopecia”. In fact, the average daily hair loss of normal people is about 50 roots, which is a normal metabolism, and the number of hair shed and new hair is about the same every day, so it will not thin out. If you lose 100 to 120 hairs per day for more than three months, it is pathological alopecia. If you don’t lose much hair, but the hair grows very slowly and the hair thins, it is also pathological alopecia. You should go to a regular hospital dermatology department as soon as possible, but some hair loss patients who are “eager to save their hair” often “rush to the doctor”, either superstitious prescriptions or the so-called “special drugs”; either They believe in the advertisements of some beauty salons, hair care centers and shampoo products, mistakenly believing that “hair loss prevention” belongs to the category of beauty, and use some hair growth products. They hope to regain thick hair in 1-2 months, or even less. The hair growth cycle can be divided into three phases: the anagen phase, the regression phase and the resting phase. The anagen phase of hair is 3 to 5 years, the receding phase is 2 to 3 weeks, and the resting phase is about 3 months. Hair in a healthy state can grow about 1 cm a month. Therefore it is almost impossible to grow thick hair in a short period of time. In addition to early detection and treatment in a regular hospital, the correct approach is to insist on long-term treatment. Generally speaking, seborrheic alopecia can be taken orally under the guidance of a doctor finasteride, which generally takes 6 months to begin to take effect, and 1-2 years of continuous treatment can achieve the best results.