Oily scalp is a common hair problem for many women. Hair may look clean in the morning but turn greasy by evening. This can feel annoying and tiring. Many women feel they need to wash their hair again and again. Some feel shy because flat and oily hair looks dull. An oily scalp does not mean dirty hair. It only means the scalp makes more oil than needed. This oil is called sebum. Sebum helps protect the scalp, but too much makes hair care for women with oily scalp.