Red dots on sweat pores are considered to be related to conditions such as perifollicular keratosis, contact dermatitis, malassezia folliculitis, and milia. 1. Keratosis pilaris: Keratosis pilaris is related to genetic and metabolic disorders, and may affect the appearance of the skin. It is mainly characterized by keratosis, roughness, thickening, dryness and other manifestations of the skin, with small red papules at the hair follicles in the early stage. 2. Contact dermatitis: an allergic reaction that occurs after contact with certain sensitizing or irritating substances. The skin lesions caused by dermatitis are diversified and may appear as described above. 3. Malassezia folliculitis: Malassezia folliculitis is a fungal infectious folliculitis. Inflammatory papules may appear at the pores of the skin, which may be surrounded by redness, and they are likely to occur on the chest and back, neck and shoulders, upper arms, and lumbar and abdominal regions, and are often symmetrically distributed. 4. Corn Rash: Corn Rash is commonly known as prickly heat, considered and environmental factors, such as often in a high-temperature environment, the body produces a large amount of sweat, can not be evaporated in a timely manner or discharged from the body, resulting in the appearance of a lot of small red dots in the local area. Sweat pores have red dots, if there are no other symptoms, it is recommended to pay attention to skin care. If the local itching and pain is obvious, it is recommended to go to the hospital dermatology department in time to understand the cause.