Your cat has a pimple filled with pus it then bursts and stinky odor makes cavity into his skin It takes more than week to heal what is it?

I'm sorry to hear your cat is experiencing this. I'm not a veterinarian, so I can't provide medical advice. It sounds like your cat might have a skin infection, but it's important to have a veterinarian examine your cat to determine the cause and the best course of treatment.

Here's why you should take your cat to the vet immediately:

* Infection: The pimple, pus, and odor strongly suggest an infection. Untreated infections can spread and become more serious.

* Underlying Conditions: Skin issues can sometimes be symptoms of other health problems.

* Proper Diagnosis: A vet can identify the specific type of infection (bacterial, fungal, etc.) and determine the most effective treatment.

Please don't delay in seeking professional veterinary care for your cat.