I left a braid for my son just for fun. Later, I heard that you can't just cut it off. I want to ask, do you have any opinions?

There is nothing to say, leaving a pigtail, the child will be laughed at by his classmates after school, making him hold his head in front of his classmates and teachers, hurting his self-esteem, and I don't know if it will harm the child. ?

Hair refers to the hair that grows on the head. Hair is not an organ, so it does not contain nerves and blood vessels, but cells. Hair is mainly used to protect the head. Soft and fluffy hair is elastic, which can resist light collision and help head sweat evaporate.

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.

physiological property

Hair can be divided into papillae, hair follicle, hair root and hair shaft from bottom to top. The physiological characteristics and functions of hair mainly depend on nipples, hair follicles and sebaceous glands under the scalp epidermis.

Hair follicle is the part of hair root in dermis, which consists of inner hair root sheath, outer hair root sheath and hair ball. Inner hair root sheath is the sheath layer directly adjacent to hair in the later stage of hair development. The inner hair root sheath is a hard thick-walled keratinized tube, which determines the shape of the cross section when the hair grows. The lower part of the inner hair sheath has three layers: Huxley sheath, Henler sheath and the surface layer of the inner hair root sheath.

Before hair keratinization, the inner hair root sheath grows with hair, and its source is the cells propagated at the bottom of hair follicle. Near the epidermis, the inner hair root sheath is separated from the epidermis and hair follicles.