The hair on your head grows from a root known as a follicle, which extends out from underneath the skin on your scalp. Each strand of hair has its own life cycle. Growth happens in four stages ...
Hair serves an important cosmetic function for humans, and the hair follicle produces sweat gland products that help to control body temperature and release pheromones 3. Billions of people ...
Like other, more active and quickly proliferating organ systems, hair follicles may be easily disturbed in their normal growth cycle by systemic and local influences, including specific skin diseases.