Closed mouth acne on the nose, it is recommended to first pay attention to reasonable cleaning of the skin, and at the same time the topical use of retinoids for treatment. Closed-cell pimples are a manifestation of skin damage in the early stages of acne, most of which are caused by exuberant sebum secretion and excessive keratinization of hair follicles. The mouths of the hair follicles form small skin-colored bumps, which do not communicate with the outside world, and closed-cell pimples growing in the triangle area must be careful not to squeeze them with their hands. 1. Reasonable cleaning of the skin, regulating the endocrine function: it is recommended to pay attention to the use of water to wash the face, the use of more gentle cleanser to clean the skin, do not use poor quality cosmetics, and at the same time regulate the function of the endocrine function, to ensure adequate sleep, do not stay up late, reduce greasy, high sugar food and dairy products intake, maintain a pleasant mood. 2. Use retinoid drugs: you can use retinoid drugs such as retinoic acid cream and adapa gel externally to carry out the treatment, and you can also choose physical methods to carry out the treatment when it is serious, such as photorejuvenation, photodynamic therapy, red and blue light irradiation and so on. For the skin damage of closed mouth acne, it is recommended to consult the dermatology department of regular hospitals for diagnosis and treatment.