Frequent nose pimples and redness are usually acne, and the causes may be related to high androgen levels, Propionibacterium acnes infection, and abnormal keratinization of follicular sebaceous gland ducts. 1. High androgen levels: If androgen is at a high level, it can cause the sebaceous glands to over-secrete oil, resulting in nose acne and redness. 2. Propionibacterium acnes infection: When infected with Propionibacterium acnes, the nose can be stimulated to produce an inflammatory reaction, resulting in redness, swelling and acne. 3. Abnormal keratinization of follicular sebaceous gland ducts: If the follicular opening is over-keratinized, it can lead to duct obstruction, preventing the discharge of shed epithelial cells and sebum, which can lead to the formation of pimples. It is recommended to go to the regular hospital in time to the nose often acne red swelling, clear cause, under the guidance of the doctor for standardized treatment, do not blindly deal with their own, so as not to delay the condition.