A hard lump in a cat’s neck may be caused by drug injection, tumors, skin diseases and other factors. First of all, after the cat is vaccinated, the vaccine is not completely absorbed and hard lumps form on the skin. At this time, the owner can apply hot compress to help the lumps dissipate. ​​​​​​

Secondly, if the cat is infected with fungi, mites and other pathogens, it will also form hard lumps on the skin. At this time, the owner can take the cat to a nearby hospital for examination and diagnosis, and treat it with medication.