Thats called an abscess and it is usually caused by some type of puncture wound (usually a cat fight or some type of bite). He must be taken to the veterinarian where they will lance it, drain and clean it and possibly put a drain in until it heals. He needs antibiotics to kill the infection. Abcesse's are very painful so its recommended that you take him ASAP. Good luck...any more questions...visit me at Liveperson. If I'm not online leave me an email and I will get back to you!
My cat has a hole with a large lump and puss coming out of it on his leg, have cleaned it with salt water and put antiseptic cream on it is there anything else I can do
My Cat Has A Wound That Is Swollen And Puss On His Leg. What Can I Do To Help Him
Ideally, vet is a good option for all types of injuries or illnesses in pets because sometime problems can be serious. Infection on leg of your cat can be treated by application of topical antibiotic. Remember to cover the wound with bandage after applying antibiotic as cat can lick the medicine. In case of severe infection, oral antibiotics are also recommended along with topical.
My cat has an infection in its leg and neck area. We don't have enough money to go to the vet but if we have to we will. What should we do?