Hair Diseases

TYPES OF HAIR. There are three types of hair. Thick, pigmented hairs are called terminal hairs. Terminal hairs on the top of the head and in the beard, axillary, and pubic areas are infl uenced by androgens. Androgens are important in regulating hair growth. At puberty, androgens increase the size of follicles in the beard,…

Rashes arising in the dermis

Rashes arising in the dermis The erythemas Complex reactions occurring in the capillaries and arterioles of the skin cause erythema, which is simply redness of the skin. This may present as flat macules or as papules, which are raised above the surrounding skin. The lesions may be transient or last for weeks, constant or variable…