Principle of Depilation Permanent Hair Removal

2019-12-12 14:31:46

First, the structure of hair:

1. The structure of hair is divided into: (1) hair shaft (2) hair follicle

2. Upper hair follicle

(1) Funnel: hair follicle opening to sebaceous gland opening

(2) Gorge area: the opening of the sebaceous gland, the attachment of the standing hair muscle

3. Lower hair follicle

(1) Neck: The part of the hair follicle standing hair muscle attachment that contains special hair stem cells is called the bulge

(2) Bulb: ①Papillae: Contains capillaries and nerve endings to provide nutrition to the hair shaft. ② Hair matrix: The growth area of the hair follicle has melanocytes.

Two: Hair growth cycle:

Hair growth is cyclic, and each cycle includes growth period, degenerative period, and stationary period. Generally speaking, hair growth period is about 3 years, degenerative period is about 3 weeks, and stationary period is about 3 months: different parts The hair growth cycle is not synchronized, and each has its own growth cycle. The length of hair in different parts is related to the growth cycle. For example, the growth cycle of eyebrows is about two months.

Because the hair in the growth phase contains the melanin, the phototherapy hair removal device is only effective for the hair in the growth phase. Therefore, the treatment of hair loss requires multiple treatments according to the hair growth cycle.

Third, the concept of effective hair removal:

1. Temporary hair reduction: hair growth delay usually lasts 1 to 3 months;

2. Permanent hair reduction: the number of terminal hairs in the permanent treatment area is significantly reduced;

3. Hair becomes thinner, lighter in color, and grows slowly.