It is normal for hair to be oily. If the hair does not appear “greasy and shiny”, it is not necessary to wash off the oil.
Feeling oil on the hair means that the surface of the hair is covered with a sebum film, just like the sebum film protects the skin, it can make our hair more moisturized and elastic. It is actually a natural hair conditioner. If you feel oil on your hair, it is unscientific to wash it off.
Frequent shampooing will lose the protection of the sebum film on the scalp surface and promote the damage to the hair caused by the sun and air pollution.
Of course, if the hair is really oily and has a certain sour smell, then you must wash your hair, otherwise it will damage the scalp and hair.
The frequency of shampooing should also depend on individual hair quality. Generally, people with oily skin and oily hair should wash it every 2 to 3 days; people with normal skin can wash it every 3 days; for people with dry skin The time can be longer.