Hair care is a general term for hygiene and cosmetics that includes hair that grows from the human scalp and, to a lesser extent, facial, pubic and other hair. Hair care routines vary depending on the crop and the physical properties of the hair. The hair can be dyed, trimmed, shaved, picked up or removed in other ways with treatments such as waxing, sweetening and threading. Hair care services are offered in salons, hair salons and day spas, and the products are commercially available for home use. Laser hair removal and electrolysis are also available, although these are provided (in the United States) by professionals licensed in medical offices or special spas.
Hair care and scalp care may appear separately, but they intertwine as the hair grows under the skin. The living parts of the hair (hair follicle, hair root, root cover and sebaceous gland) are under the skin, while the actual stem that emerges (the cuticle that covers the cortex and the medulla) has no living processes. Damage or changes in visible hair can not be repaired by a biological process, although much can be done to control the hair and ensure that the cuticle remains intact.
The scalp, like any other skin on the body, must be kept healthy to ensure a healthy body and healthy hair production. If the scalp is regularly cleaned by people who have rough hair or have a hair loss problem, it can cause hair loss. However, not all scalp disorders result from bacterial infections. Some are inexplicably created and, often, only symptoms can be treated to treat the condition (eg, dandruff). There are also bacteria that can affect the hair itself. Lice are probably the most common hair and scalp diseases in the world. Lice can be removed with great attention to detail, and studies show that this is not necessarily associated with a lack of hygiene. Recent studies show that lice really thrive on clean hair. In this way, hair washing as a term can be a bit misleading, as in the production and care of healthy hair, often the surface of the scalp is often cleaned just as the skin needs to be cleaned for good hygiene .
The sebaceous glands in human skin produce sebum, which consists mainly of fatty acids. Sebum protects hair and skin and can inhibit the growth of microorganisms in the skin. Sebum contributes to the slightly acid pH of the skin between pH 5 and pH 6.8. This oily substance imparts moisture and shine to the hair while moving naturally through the hair shaft, and serves as a protective substance by preventing hair from drying out or absorbing excessive amounts of external substances. Sebum is also distributed “mechanically” by brushing and combing hair. If the sebum is present in excess, the roots of the hair may appear greasy, greasy and darker than normal and the hair may stick.