Why is oiliness caused?
The skin all over the body produces oil from glands called as sebaceous glands. These glands secrete sebum, which is an oily substance and the cause for oiliness in the body. These glands are overactive in some parts of the body such as the face and scalp for some people. On the scalp, excessive oiliness is caused when these glands that are attached to the hair follicle release excess sebum.