There is a pimple on the scalp, which is very itchy. What is the cause of serious hair loss?

There are three main types of alopecia: one is neurogenic alopecia, the other is seborrheic alopecia, and the mixture of the two. Some people also divide hair loss into male hair loss, female hair loss, alopecia areata, congenital hair loss, traumatic hair loss, periodic hair loss and other types. Neuropathic alopecia is a kind of "deficiency" disease, which is manifested in the head. Because of "seven emotions" (referring to joy, anger, worry, thinking, sadness, fear and shock) internal injuries, qi and blood imbalance, poor operation, hair follicles can not be nourished, nutrition is cut off, and large areas fall off quickly. The second type is seborrheic alopecia, commonly known as baldness, which is a phenomenon of progressive hair degeneration. At first, there was a lot of hair oil, dandruff and itchy scalp. Then when combing hair and washing hair, hair loss is serious, the hair on the top of the head and temples becomes scarce, the scalp in the hair loss area becomes thin and smooth, and the pores gradually close. Lesbians, on the other hand, show diffuse alopecia all over the body, and baldness usually occurs at the age of 5 to 10. This phenomenon is mostly caused by excessive mental burden, excessive brain use and excessive consumption of alcohol and tobacco. , so that the body contains damp heat. Due to the evaporation of damp heat, the head secretes too much oil, which becomes fatty acid in the scalp constant temperature and oxygen oxidation, and is reabsorbed by the scalp hair follicle, destroying the epithelial cells of the hair follicle. Cause deep tissue ischemia and hypoxia of hairy roots. This situation is more common in leaders, intellectuals, entrepreneurs and artists. Seborrheic alopecia can be divided into early, middle and late stages. Early oily, itchy and dandruff. When I was washing my hair, I lost a basin full of hair, sometimes hundreds, combed dozens and kept losing it. My scalp is a little red and I have small pimples. In the middle stage, hair loss is serious, the top of the head is sparse, and the scalp is exposed when the wind blows. In the later stage, the top of the head is smooth or a little fluffy. Hair growth is directly related to kidney, liver and qi and blood. Kidney is the foundation of congenital and the source of essence and blood. Kidney produces marrow and bones, and its flowers are in hair. Liver governs blood, and blood deficiency leads to dryness. This shows that no matter what kind of hair loss, it is related to liver depression and kidney deficiency. Not tonifying kidney is like planting crops without fertilization.