Hair becoming oily is related to heredity, hormone levels and lifestyle habits. 1. Heredity: Hair oil is mainly due to the head sebaceous gland secretion function is exuberant. Some people are born with oily skin, and the sebaceous glands secrete sebum more vigorously, so it is easy to cause hair to become oily. 2. Hormone levels: when too much androgen production or imbalance between the levels of male and female hormones, so that androgen levels increase, it is easy to lead to the sebaceous glands increase, resulting in increased sebum secretion, which in turn causes the scalp to behave greasy, the hair becomes oily situation. 3. Lifestyle habits: for example, frequent intake of high-calorie, stimulating food, often stay up late, day and night, etc., these factors can cause endocrine imbalance, so that sebaceous glands secretion is more exuberant, resulting in hair become oily. Wash your hair too hard, use a poor-quality washing products, etc., will also destroy the sebaceous glands, resulting in sebum secretion disorders, resulting in the phenomenon of hair love oil. In short, there are many factors that can cause hair to become oily, such as the cause of discomfort timely consultation, under the guidance of the doctor for the cause of hair oil targeted treatment.