Alopecia areata starts as one or several well-defined circular or oval hair loss areas, with straight plays about 1 to 2 cm larger. The edge of the hair loss area often has some loose and easy to lose hair, some have been broken, near the lateral end of the hair often atrophy. If the hair is pulled out, the hair can be seen on the thick and thin like an exclamation mark (!) The lower part of the hair is also depigmented. As the hair loss continues to increase, each piece expands and can fuse with each other to form an irregular shape. If it continues to progress, it can be completely bald. In severe cases, eyebrows, eyelashes, axillary hairs, pubic hairs and all over the body hair are also lost to form alopecia areata. The symptoms of alopecia are very obvious, and the appropriate tests are selected according to the cause of the disease. 1. Examination of hair follicles. The examination of hair follicles is the key to determine whether new hair can be produced. How many hair follicles are necrotic? How many follicles are occluded? How many hair follicles are good? How much new hair can be grown if treated? The scientific examination tells you that if there are more necrotic hair follicles, there is no need to treat them and the doctor will suggest you to give up or replace the hair transplant, it is not the hair transplant organization that identifies whether hair replacement or hair transplant is needed, it is the doctor, it is the technology that decides whether the treatment is in the hair follicles, in yourself. 2, the examination of the hair root. Under the premise of good hair follicle examination, light microscopic examination of hair roots is done to check the cause of hair root aging? Are there any pathological changes in the root of the hair? Why no new hair growth after hair loss? Many hospitals do not have this examination is not right, hair root like tree roots, tree big root, tree small root small, root dead tree, the same reason, hair root absorption of nutrients, human nutrition supply hair growth, the root plays a decisive role, root problems will lead to hair loss discoloration, less white head is formed in this way, in order to solve the problem of hair loss, hair root examination plays an important factor! 3.Check the trace elements of the hair. Many people know that lack of calcium can lead to osteoporosis, lack of iron will cause anemia, however, the theory of Chinese medicine “hair for the rest of the blood” proves that the hair is the end of the body’s qi and blood performance, qi and blood is strong hair strong, qi and blood deficiency will wither and fall off, trace elements such as iron, zinc, calcium, magnesium, selenium, copper and other scientific examination, what is lacking to fill what is not lacking to fill the most scientific, trace elements are the nutrients needed by the human body, but also the hair needs, many people Hair loss only know check the hair follicle, do not know also need to check the hair root and trace elements. The examination of hair follicles proves whether new hair can be treated, and the examination of hair roots and trace elements determines how to treat more scientifically, the former is whether it can be treated, and the latter is how to treat.