At present, people between 20 and 40 years old in China have gradually become the main force in the hair loss army, and among them, the fastest development of people around 30 years old, this phenomenon shows that the age of hair loss nowadays is 20 years earlier than the previous generation. In the process of treating hair loss, we will often mention that the hair follicle closure, hair follicle necrosis, so what is the hair follicle, it is so important? I. What is a hair follicle? The hair follicle is a sac-like tissue that surrounds the root of the hair, the inner layer is the epithelial tissue follicle, the outer layer is the connective tissue follicle, the inner layer is connected to the epidermis, and the outer layer is connected to the dermis. The hair follicle is composed of hair rods, hair projections, hair bulbs, hair papillae, and hair stroma. Nerve fiber endings give the hair follicle its sensory function, and arterial and venous capillary plexuses supply blood to the follicle. The deepest part of the hair follicle is the hair papilla, located 3-7 mm from the stratum corneum, which contains nerves and blood vessels that provide nutrients to the hair shaft. The hair follicle develops through a complex series of interactions between the epidermis and the dermis, while being cyclical in nature. Second, what are the characteristics of hair follicles? 1, non-renewable hair follicles are non-renewable resources, the number of hair follicles in a person’s life will only be less and not more, so if a hair follicle completely closed, it will never be able to wake up, you will lose this hair follicle forever. 2, with genetic hair follicles not DHT target organs is the main reason for hair loss, DHT we all know, is androgen in the role of reductase generation of a substance, the scientific name of dihydrotestosterone, and carrying genetic hair follicles (generally concentrated in the top of the head and frontal corners) is the target organs of DHT, suffer DHT action will gradually atrophy, until completely closed. Therefore, once the hair follicle is closed, then it will not continue to grow hair. Third, how to determine whether the hair follicle is healthy or not? For example, the computer can calculate the diameter and density of the hair after obtaining the image of the hair follicle, and after comparing with the normal data, we can understand the degradation of the hair follicle. You should go to a professional hair transplantation institution for hair follicle testing, because in the process of testing you may encounter doctors recommending drugs to you, which will not only cost you money, but also delay your recovery, and even some hospitals, in case your hair follicles are not closed, encourage you to have a hair transplant, which not only costs you money, but also destroys the hair follicles that are not closed around the hair transplant area. It is not renewable and the recovery effect is not as good as the native hair. The actual fact is that it is very important to choose a right hospital. If you are often concerned about various hair growth products or hair growth methods, you should notice that many hair growth products or hair growth methods are based on the fact that the hair follicles are not completely dead. When the hair follicles are healthy, we may not care too much, but once too many hair follicles die, we will regret too much. Five, how to protect our hair follicles? 1, avoid too frequent perm and dye hair frequent perm and dye hair will cause great damage to the hair follicle, will accelerate the decay of the hair follicle, so, usually avoid excessive frequent perm and dye damage to the hair follicle and hair. Also do not shave your head or cut too short flat head, scalp without hair protection will make hair follicles directly exposed to the sun, radiation, etc., causing damage to the hair follicles. 2, adhere to the scalp massage, to ensure that the hair follicle nutrient supply channel smooth The top of the human head scalp does not have a larger arteriovenous vessels in it, completely rely on smaller vessels, microvascular and capillary network bed to supply the hair follicle hair oxygen and nutrients, take away the cellular discharge of waste. The diameter of capillaries is less than 0.01 mm, and the diameter of red blood cells is 0.007 mm, so blood does not flow easily and capillary atrophy and occlusion can easily occur; therefore, frequent massage on the scalp to improve scalp blood circulation is one of the most effective ways to ensure healthy hair growth. You can massage your scalp in circles with your finger belly for 10-20 minutes a day to promote the blood circulation of the scalp to ensure the nutrient supply of the hair follicle cells and promote the regeneration of new hair. 3, to ensure adequate sleep and a healthy state of mind Sleep is an essential way for us to recuperate and restore various body functions. Long-term lack of sleep will directly affect the hair follicle cells to get enough blood nourishment, cell tissue metabolism becomes extremely slow, resulting in the scalp peripheral nerve dullness and degeneration, which is not conducive to hair growth. Beautiful hair can be slept out, sufficient sleep is essential to promote the skin and hair follicles to ensure normal metabolism, it can promote the hair and skin into a healthy growth of the virtuous cycle.