Sudden red patches on the face when you sweat a lot may be caused by seborrheic dermatitis, folliculitis or acne, and are usually treated with medication.
1. Seborrheic dermatitis: due to the sebaceous glands secretion leads to inflammation of the skin, may be manifested as red patches that do not itch, usually through drug treatment, such as topical tacrolimus.
2. Folliculitis: the reproduction of bacteria in hair follicles leads to the sudden appearance of painless and itchy red patches on the face, which are usually treated with drugs such as topical mupirocin.
3. Acne: due to sebaceous gland excretion disorder, sweating is more likely to block the sebaceous glands, resulting in acne, may cause the appearance of red spots on the face without itching, usually through the treatment of drugs, such as topical fusidic acid, vinpocetine and so on.
Sweating more suddenly on the face of the red spot does not itch may also be psoriasis, if the symptoms are serious need to go to the hospital in a timely manner, under the guidance of the doctor’s medication, do not self-medication, so as not to delay the condition.