If the owner finds hard pimples under the dog's skin, it may be that the dog has folliculitis, which is caused by bacterial infection. You can give it some antibiotics to treat it.

It is also possible that the dog is infected with lymphadenitis. In addition to hard pimples, this disease can also cause If the lymph nodes throughout the dog's body appear swollen and painful, the dog needs to be taken to the pet hospital for treatment.