If a cat vomits yellow water after eating a plastic bag, the cat must be induced to vomit in time. If the cat cannot vomit out the plastic bag, it must be sent to the hospital for examination and treatment immediately, and the plastic bag must be surgically removed. Otherwise, it will easily affect the cat's health. You should always be careful not to let your cat play with dangerous items, such as plastic bags that can be eaten. If you see your cat playing, you need to stop it immediately.