Red patches on the body without pain or itching may be caused by florid furuncle, psoriasis or allergic purpura, etc. You can choose general treatment and drug treatment according to different causes.
1. Malassezia: the skin stratum corneum is damaged by Malassezia infection, causing red patches on the body without pain or itching, generally treated with medication, such as oral itraconazole or topical ketoconazole ointment.
2. Psoriasis: painless and itchy red patches accompanied by scales appear on the skin of the body, usually treated with topical medicines such as Capotriol or Tazarotene.
3. Anaphylactic purpura: due to various causes of allergic reactions, the capillaries and small blood vessels and peripheral inflammation, so that the permeability of the blood vessel wall increases, erythema occurs. Most of the allergic purpura is self-limiting, pay attention to rest, can also be applied locally mucopolysaccharide polysulfate ointment and other drugs can be relieved.
Red patches on the body without pain or itching may also be erythema multiforme, if the symptoms are serious, you need to go to the hospital in a timely manner, under the diagnosis of the doctor for treatment, do not self-medication, so as not to delay the condition.