Dry and oily skin can be caused by endocrine reasons, bad habits, and the influence of temperature. 1. Endocrine reasons: human hormones are divided into estrogen and androgen, and androgen stimulates oil secretion, once the sebaceous glands are over-exuberant, secretion of excessive oil, dry skin may appear to become oily skin. 2. Bad lifestyle habits: such as staying up late, excessive stress, and consuming too much greasy food, can lead to deterioration of the facial skin condition and increased oil secretion, resulting in oily skin. 3. The influence of temperature: temperature affects the skin’s oil secretion, as the temperature rises, the secretion of oil will also increase, so that the skin becomes oily. There are many factors affecting dry skin to oily skin, it is recommended to go to the hospital, clarify the cause of the disease, and carry out symptomatic treatment.