A lot of small bumps on the ears and red and swollen may be triggered by eczema, folliculitis, contact dermatitis and other factors. 1. Eczema: may be malnutrition, genetic factors or endocrine disorders caused by superficial dermal and epidermal inflammation. Eczema can occur in many parts of the body, such as the ears, face and hands. Localized pimples and erythema may also be present. 2. Folliculitis: It may be caused by more body oil, not paying attention to local hygiene, or the prolonged use of steroid drugs and other factors that lead to the skin at the ear being invaded by bacteria, fungi and other pathogens. It will cause obvious itching, redness and swelling. May also be accompanied by pimples, pustules and other discomfort. 3. Contact dermatitis: may also be the ear to pollen, insect mites or clothing some kind of material allergy caused by the perverse reaction, the local may also appear red rash. As the disease develops, small bumps may appear on many parts of the body, causing redness and swelling. The above phenomenon, you can go to the hospital for relevant examination, for the cause of the treatment, to avoid continued aggravation of the disease, triggering the body to experience discomfort.