Detailed answer

Oily skin is primarily caused by excess sebum production by the sebaceous glands. Hormonal changes, such as during puberty, pregnancy, or menopause, can stimulate oil production. Genetic factors can also play a role, as some individuals are simply predisposed to oily skin. Additionally, using skincare products that are too rich or heavy, or taking certain medications like steroids, can contribute to oily skin. It is important to note that while oily skin can be bothersome, it is also important for maintaining the skin's natural moisture barrier. Proper skincare and lifestyle habits can help manage oily skin effectively.