Hair is the fastest growing hair in the human body, and the growth rate varies with individual physique. Normal human hair is about 0.27-0.4 mm long every day and about 1-2 cm long every month. Boys' hair grows about 0.02-0.05cm every day and about 1- 1.5cm every month. Girls' hair grows about 0.03-0.06 cm every day and about 1.3-2 cm every month.
Girls' hair grows faster than boys'. Hair also has a life span, not endless growth. The life span of hair is generally 2-7 years, and the hair growth cycle of a few people can reach 15-20 years, and the longest can reach 25 years.
On average, each person has about 654.38+ million hairs. Of all the hairs, the length of hair is the longest, especially for women with long hair. Some can grow to 95 ~ 100 cm, or even 150cm, but generally it will not exceed 200cm.
Daily maintenance
(1) Before you comb your hair properly, you'd better take some time to comb your hair and then untie the knotted part. The motivation of combing your hair is to comb away the dirt on your scalp and hair.
(2) correct shampoo and hair care. Shampooing can replenish nutrients to injured hair and rejuvenate it from the inside out. Therefore, the health of hair depends on the quantity and type of hair care products you use. Basically, you should wash your hair before you care for it. Therefore, if you want to have bright black hair, you should pay attention to the methods and times of hair care.
(3) Care after washing: After washing your hair, dry your wet hair with a towel first, and then pay attention. Never pick up the hair dryer and blow your hair right away. Before drying with a hair dryer, be sure to squeeze out the water with a towel.
(4) Precautions for blowing: Because blowing with a hair dryer will make your hair more messy, it is best to comb your hair before blowing, so as to avoid knotting your hair and it will hurt when blowing.