Question

why do you need to wash our hair? In point​

Answer 1

Answer:

Shampoo helps water remove dirt, debris, and odors, such as smoke or sweat effectively. Shampoos can also remove oil. The hair gets its oil from sebaceous glands that secrete oil called sebum, which keeps the hair moisturized. ... But too much moisture can make the hair look greasy, limp, and dirty.

Answer 2

Answer:

For the average person, every other day, or every 2 to 3 days, without washing is generally fine. “There is no blanket recommendation. If hair is visibly oily, scalp is itching, or there's flaking due to dirt,” those are signs it's time to shampoo, Goh says.