Hair follicles are tiny structures in the skin that produce hair. Each follicle is a small, tube-like pocket that extends from the surface of the skin down into the deeper layers. They are found all over the body, except on the palms of the hands and soles of the feet. Each follicle contains a hair bulb, where hair growth begins, and is surrounded by a network of blood vessels that supply nutrients. The growth of hair from follicles occurs in cycles, including phases of growth, rest, and shedding. Factors such as genetics, hormones, and overall health can influence hair growth and the condition of the follicles. Proper care of the scalp and skin can help maintain healthy hair follicles.