Masks worn for a long time face a small rash, because of allergic rashes or skin diseases such as folliculitis, need to treat the cause. 1. Allergic rash: may be related to the material of the mask itself, sensitive skin is prone to allergic reactions, this time try to replace the mask to avoid direct contact with the mask skin, itching and erythema, such as local use of benadryl cream, mometasone furoate cream, etc., the serious need to be combined with oral antihistamines such as chlortetracycline. 2. Own skin disease: due to long time wearing masks, poor skin permeability, resulting in local skin environment hot and humid, leading to folliculitis and other skin diseases. In this case, we should pay special attention to the cleanliness of the skin on the face and avoid wearing masks for a long time. Skin diseases caused by folliculitis, you can use fusidic acid cream and other sterilization and anti-inflammatory and other drugs to apply to the affected area. At the same time, the diet should also avoid spicy stimulation, to light. It is recommended to wear a mask for a long time on the face of a small rash caused by discomfort in a timely manner, follow the doctor’s instructions for treatment, do not self-medication.