Large red bumps are itchy and may be caused by urticaria, atopic dermatitis, acute eczema and other causes.
1. urticaria: it is a vascular skin reaction, manifesting itself as a brief itchy outbreak of water scars, which is a well-defined, smooth, mildly elevated red spot on the surface of the skin, presenting large red bumps are itchy.
2. Allergic dermatitis: the general cause of itchy red bumps on the skin is allergy, allergens are more, including food, drugs, environmental factors, etc., can cause skin allergies presenting symptoms of itchy red bumps.
3. Insect bite dermatitis: most cases are related to insect bites, skin allergic reaction occurs after insect bites, resulting in localized inflammatory edema of the skin, redness, erythema, blisters with itching at the place of the bite, so it is easy to show up as itchy red bumps.
Therefore, the appearance of red bumps itchy may also be hives-like drug rash, etc., should promptly consult a doctor, under professional guidance for diagnosis and treatment.