First, you need to know that there are different types of worm like ringworm, tapeworm, hookworm and so on that may affect your cat.
Cats can pick up worm from about anything, from eating feces to getting it from their mother as well as from fleas. You must be observant of your cat’s behavior to be able to tell when the have worms.
To tell if your cat has worms, you will notice a number of things. The symptoms of worm in your cat includes worm in the feces or around the anus. Your cat would be vomiting and have a bloody stool. Also, you will notice a constant coughing, unexplained weight loss, and bloating around the belly.
The best way to help your cat in this case will be to take him/her to the vet. You can also consider using a prescribed deworming medication if your appointment will take long.