Red patches on the body without pain or itching may be hemangioma, hemophilia, thrombocytopenia, syphilis and other causes.
1. Hemangioma: a kind of skin capillary tumor lesion with unknown etiology, benign hemangioma in infants and young children is manifested as congestive erythema protruding from the skin surface. It can be treated by applying timolol cream, prednisone, sirolimus and other medicines, and surgery if necessary.
2. Hemophilia: it belongs to X chromosome-linked recessive genetic disease, in which the synthesis of coagulation factor VIII and coagulation factor IX is impaired in the patient’s body, resulting in coagulation disorder due to the lack of coagulation factors, and therefore the skin will bleed to form ecchymosis which is painless and itchy. It is necessary to avoid physical injury and apply recombinant coagulation factor, arginine pressin, aminocaproic acid and other drugs for treatment.
3. Primary thrombocytopenia: primary immune thrombocytopenia is caused by autoimmune dysfunction, the body’s anti-platelet autoantibodies attack platelets, resulting in thrombocytopenia, coagulation dysfunction, skin bleeding and the formation of painless petechiae. Methylprednisolone, gammaglobulin, rituximab and other medications can be applied, and platelet transfusion is necessary.
4. Syphilis: after syphilis spirochete infection, second-stage syphilis manifests itself as a painless and itchy syphilis rash (red papules and plaques) all over the skin. Penicillin, ceftriaxone and other treatments can be applied.
The red patches on the body do not hurt and itchy may be related to a variety of factors, it is recommended to consult a doctor to clarify the diagnosis, standardized treatment under the guidance of the doctor. Drugs need to be used in accordance with the doctor’s instructions, do not self-medication.