Pimple-like bumps on the body are a relatively common clinical manifestation. There are many diseases in dermatology that can cause pimples and similar bumps on the body, and the most common causes are mainly the following: 1. Nodular itchy rash. Patients with nodular itchy rash will have pimple-like bumps on their bodies, large green pea-like bumps. This is a very common cause of nodular itch. 2. Patients with contact dermatitis have an acute inflammatory reaction due to exposure to certain allergenic substances or chemicals, which can result in acne-like bumps, blisters, and rashes. 3. eczema. The patient with eczema dermatitis will cause corn-like papules, blisters, vesicles, and oozing on the skin all over the body. 4. papules to urticaria after a mosquito bite, will appear on the patient’s body as pimple-like size to green pea size bumps.