Itchy skin red bumps on scratching may be hives, eczema and other diseases caused by the patient should consult a doctor in a timely manner to clarify the cause of the corresponding treatment. 1. urticaria: itchy skin a scratch red bumps may be caused by urticaria, patients often manifested as a wind, angioedema, the wind more in the skin after the itch, and more in the trunk and the proximal limbs, such people should avoid re-exposure to allergens, if necessary, the use of glycerol, cetirizine, loratadine, dexamethasone and other drugs for treatment. 2. Eczema: itchy skin with red bumps when scratched may also be caused by eczema, the patient in the onset of more contact with pollen, detergents and other allergens, after scratching there will be a bilateral symmetrical distribution of polymorphic rash, such patients should be active to eliminate the cause of the disease, the topical use of glycerol, mometasone furoate ointment and other treatments. All of the above drugs should be used under the guidance of a doctor. It is recommended that the patient go to the hospital in time to clarify the cause of the disease and follow the doctor’s instructions to standardize the treatment.