Itchy skin scratching bumps may be eczema, urticaria and other diseases, patients should consult a doctor in a timely manner to clarify the cause of treatment. 1. eczema: itchy skin scratching bumps may be caused by eczema, the patient will also have a symmetrical distribution of the skin polypoid rash, accompanied by oozing, can be used externally with glycerite, urea, hydrocortisone butyrate cream and other treatment. 3. urticaria: if the patient is in contact with animal hair, dust after the skin itching and scratching a string of bumps, should be considered to be allergic to urticaria caused by patients will have itchy parts of the rash, angioedema, should be avoided to contact with the allergens again, local topical glycerine lotion, if necessary, you can use loratadine and other treatments. All of the above drugs should be used under the guidance of a doctor.