A hard lump in the dog's neck after an injection

It is normal for a dog to have a hard lump in its neck after an injection. The drug is injected subcutaneously. If it cannot be absorbed and dispersed temporarily, it will cause local lumps. Medical gauze can be soaked in hot water, wrung out and then applied hotly to the dog's hard lumps, which can speed up the absorption of the medicine. If your dog has a hard lump that does not disappear for a week or more, and there are adverse symptoms such as pus, seek medical attention promptly.