Cats will be bitten by mosquitoes. Because mosquitoes feed on blood, they will also bite cats. Cats will also experience local itching, redness and swelling after being bitten by mosquitoes. You need to help the cat reduce the swelling and itching in time. , you can use soapy water to apply to the area where the cat was bitten. If the swelling does not subside after a day, it is best to take the cat to a pet hospital for desensitization treatment.