If there is itching all over the body, accompanied by small red bumps, the most likely condition is allergy. Allergies are clinically categorized into different diseases, which may be eczema dermatitis or drug rash. Eczema dermatitis is an itchy condition that occurs when allergens irritate the skin, accompanied by small red bumps. The treatment is simple, you can take anti-allergy drugs, can also use anti-allergy ointment, can achieve good therapeutic effect. In addition, there is also a case of drug rash, due to oral, injection and topical drugs, triggered by the body to the drug allergic reaction. This kind of situation need to go to the hospital in time, by the doctor for diagnosis and treatment, do not self-medication.