Small bumps on arm allergy are caused by local contact with allergenic substances and can be controlled by general treatment and medication under the advice of a doctor to relieve clinical discomfort. 1. General treatment: patients need to avoid contact with substances that cause arm allergies, and it is recommended to avoid scratching to avoid infection. Patients can avoid alcohol and tobacco, regular work and rest, and eat a light diet to promote the improvement of symptoms. 2. Medication: patients can apply local glycerine lotion to reduce the itching effect, when the symptoms are serious, patients can take loratadine, benadryl and other anti-allergy drugs to improve the symptoms. Drugs need to be used in accordance with the doctor’s instructions, the emergence of adverse reactions need to consult a doctor in time, drug allergy is prohibited to use. The arm allergy with small bumps should be timely consultation, follow the doctor’s instructions standardized treatment, do not self-medication.