If a dog has a red bump on its leg, it may be a hematoma. The pus needs to be extracted with a syringe and treated with antibiotics. Dogs may also suffer from skin diseases. Skin diseases caused by fungi, mites or bacteria may make the skin red, swollen and form bumps.

If it is a hard lump, it may be tumor hyperplasia or lymph node hyperplasia. This situation is generally treated with surgery, and sometimes it is caused by parasitic infection. At this time, anthelmintic drugs need to be used to kill it, and in rare cases, it is caused by parasitic infection. Caused by allergies. However, no matter what the cause is, the general prognosis is good. In specific cases, the owner still needs to take the dog to the pet hospital for examination and diagnosis.