a closed sac or cyst below the surface of the skin which may affect the
scalp, ears, back, face,and may occur anywhere on the
body except the
palms of the
hands and soles of the feet. They are smooth to the touch, vary in size, and are generally round in shape. This may be caused by blocked sebaceous glands, swollen hair follicles, and excessive testosterone production will cause such cysts. If they continue to grow, they may become unsightly, painful, or infected.