Pimples, or acne, can be caused by abnormal hormone levels, bacterial reproduction, poor hygiene and dietary habits, etc. Attention needs to be paid to changing bad habits and other ways to regulate and, if necessary, medication. Acne is a multifactorial disease. When the opening of the sebaceous glands of the hair follicles on the skin is blocked, it will cause acne, which is manifested as pimples and papules. When the level of androgen increases, the sebaceous glands will enlarge and sebum secretion will increase; long-term propagation of Propionibacterium acnes will lead to constant inflammation; poor hygiene habits, such as not washing the face, will make the follicle openings clogged, so that the sebum can not be discharged; poor dietary habits, such as spicy and stimulating food, etc., will lead to acne for a long period of time. In daily life, you should pay attention to cleanliness, avoid the use of oily cosmetics, avoid spicy and stimulating foods, avoid staying up late, eat a light diet, and use medications such as adapalene gel, fusidic acid cream, and isotretinoin to treat acne under the guidance of a medical professional if necessary.