


Staphylococcus aureus is a bacteria that frequently causes folliculitis.

Head lice: Tiny insects that live on the scalp and feed on blood.The hair pulling results in patches of noticeable hair loss its cause is unknown. Trichotillomania: A mental disorder that includes the irresistible urge to pull out one's hair.Although the patches can appear in a ring shape, no worm is involved in tinea capitis. Tinea capitis ( ringworm): A fungal infection of the scalp, creating round patches of hair loss.Seborrheic dermatitis may also affect the ears and face.
#Region x hair skin#
Dandruff (seborrheic dermatitis): Ongoing mild inflammation of the scalp, resulting in scaly skin that may be itchy and flake off.See a picture of female pattern baldness. The crown may be affected, but hair loss rarely proceeds to baldness as in men. Female pattern baldness: In women, hair loss usually includes uniform thinning across the scalp, with a preserved hairline.Male pattern baldness usually includes either a receding hairline, hair loss at the crown, or both. Male pattern baldness: The most common type of hair loss in men.The cause of alopecia is unknown the hair usually grows back. Alopecia areata: Round patches of total hair loss, usually from the scalp.With aging, pigment cells die, and hair turns gray. Hair color is created by pigment cells producing melanin in the hair follicle. Hair grows at different rates in different people the average rate is around one-half inch per month. A new hair begins the growth phase, pushing the old hair out. Telogen (resting phase): Over months, hair growth stops and the old hair detaches from the hair follicle.Catagen (transitional phase): Over a few weeks, hair growth slows and the hair follicle shrinks.Each hair spends several years in this phase. Anagen (growth phase): Most hair is growing at any given time.Hair growth occurs in cycles consisting of three phases: Blood vessels nourish the cells in the hair bulb, and deliver hormones that modify hair growth and structure at different times of life. In the hair bulb, living cells divide and grow to build the hair shaft. The hair bulb forms the base of the hair follicle. Hair is made of a tough protein called keratin. A hair follicle anchors each hair into the skin. Hair is simple in structure, but has important functions in social functioning.
