Oily Skin (Seborrhea) Causes
After birth, abundant and fully functioning sebaceous glands are present in human skin, and the sebum level on the skin is high.During the first year of life, the sebaceous glands regress, and by puberty, correspondingly little fat is detectable on the skin surface. Greasing of the surface by sebum can also be expected before puberty, … Oily Skin (Seborrhea) Causes