What characteristics define new hair growth?

New hair growth involves the development and activity of hair follicles, which are tiny structures in the skin where hair grows. According to the research by Harland, hair development is a complex process that begins with the formation of these follicles.

Key Characteristics of New Hair Growth:

1. Follicle Development: Hair growth starts when new hair follicles are formed during healing or natural growth cycles.
2. Hair Shaft Formation: Once the follicle is formed, it begins to produce a hair shaft, which is the visible part of the hair.
3. Growth Patterns: As noted by Sun and colleagues, new hair can sometimes grow in unexpected areas, especially near healing wounds.
4. Miniaturization: Rushton’s study mentions that over time, some hair follicles can shrink, leading to thinner hair, but new growth typically involves healthy, full-sized follicles.

Understanding these characteristics helps in recognizing normal hair growth patterns and identifying any unusual growth that might occur. This knowledge can be particularly useful for those observing changes in their hair or recovering from injuries.