Red bumps on the inside of the dog’s hind legs may be caused by bacterial, fungal, and parasitic infections. The dog should be bathed and dewormed on time, or use special pet sprays. During this period, the dog should wear an Elizabethan collar to prevent The dog licks to the point where the medicine becomes uncomfortable. It is necessary to adjust the dog's diet, feed it some food with less salt and oil, and take the dog to do exercises.