Hair doesn't grow in scarred areas because scar tissue lacks hair follicles.

A scar is a repair response of the skin after injury, composed of collagen secreted by fibroblasts. Scar tissue differs significantly from normal skin tissue in structure, one of the most notable differences being the lack of hair follicles. Hair follicles are the starting point for hair growth, forming in the dermis of the skin, while scar tissue is a dense structure composed of fibroblasts and collagen fibers, lacking the conditions for hair follicle formation. Hair typically does not regrow in scarred areas.

During scar formation, the normal structure and function of the skin are disrupted, especially the destruction of hair follicles, which prevents hair from growing back in the scar area. To promote scar healing and improve appearance, several measures can be taken to inhibit excessive scar growth, such as using silicone sheets or gels. These products help keep the scar moist, reducing redness and hardening. Using skincare products containing ingredients like vitamin E and aloe vera can also help alleviate discomfort associated with scarring.

[Life Tips:]
1. Use products such as silicone sheets or gels to help keep the scar moist.
2. Keep the scarred area clean to prevent infection.
3. Using skincare products containing ingredients such as vitamin E and aloe vera can help reduce the discomfort of scars.