Elderly people often have acne on their face which is not normal and may be related to blockage of follicular sebaceous gland ducts, air pollution, exuberant secretion of oil in the body, poor hygiene and irregular life. 1. Due to the follicle sebaceous gland duct blockage, especially hyperkeratosis caused by local blockage, it will cause sebum deposition, resulting in the appearance of acne. 2. If the air is heavily polluted, there are more tiny particles in the air, which over time can also cause the skin pores to become clogged, which can cause acne on the face. 3. If the body’s oil secretion is exuberant, it can also cause excessive sebum secretion, resulting in sebum accumulation can not be discharged smoothly, acne. 4. If you live an irregular life, such as staying up late for a long time, not sleeping well and having poor personal hygiene, it can lead to skin follicle infections, which can also lead to acne. In this case, under the guidance of the doctor, you can use topical adapalene gel, retinoic acid cream and other drugs to apply to improve the symptoms. At the same time, you should eat a light diet, have a regular routine, and clean your facial skin regularly.