Small red dots on the face are usually a symptom of rosacea, atopic dermatitis, viral rash or acne. 1. The cause of rosacea is not completely clear, and is mainly related to genetics, staying up late and drinking alcohol. The rash occurs on and around the nose, and in severe cases it can spread over the whole face. 2. Allergic dermatitis is an allergic reaction caused by contact with certain skin irritants on the face. Many people are caused by using low quality cosmetics and skin care products. It is characterized by the symmetrical appearance of erythematous red spots on both faces, accompanied by itching. 3. Viral rash is a general term that includes fever and maculopapular diseases such as rubella and infantile emergency rash. Most of the rashes appear as scattered small red spots, starting from the face and gradually spreading to the whole body, accompanied by varying degrees of elevated body temperature. 4. Acne is caused by abnormal sebum metabolism in hair follicles, which breeds bacteria, and is common in young people and teenagers, mostly on the face and chest and back. It is easy to appear if you often stay up late, love sweets and spicy food. There may be other reasons for small red dots on the face, it is recommended to go to the hospital in a timely manner, after a clear diagnosis of symptomatic treatment, do not blindly deal with their own.