There are many reasons why a cat's chin may become swollen. Clogged hair follicles, tumors, tissue swelling, or insect bites can all cause swelling on the chin. It is best to go to the hospital for examination. If the hair follicles are blocked, it may be caused by fungal or bacterial infection. You can spray medicine or apply ointment; if it is a tumor, it is best to go to the hospital for treatment; tissue swelling is usually caused by trauma and needs to be cleaned in time to avoid infection; usually do not Take your dog to places where there are insects. If you find that you have been stung by a bee, you need to send it to the hospital immediately.