If a cat is infected with intestinal parasites such as hookworms, tapeworms, or roundworms, it will have white, rice-grain-like worms on its body, especially around the anus. If a cat has these white, rice-grain-like worms along with other symptoms such as rough fur, vomiting, weight loss, worm eggs in its feces, and hair loss, it is almost certain that it is infected with internal parasites. 
If your cat has fleas or lice, you can: 1. Use a fine-toothed comb to brush your cat's fur to help remove the fleas and lice. 2. When bathing your cat, choose a professional flea-repellent shampoo to help clean and repel parasites. 3. Alternatively, you can use flea powder, applying it to your cat's entire body every 2-3 days to help with external parasite control.
While administering deworming medication to your cat, it's important to maintain hygiene. Clean and disinfect the cat's living environment, sun-dry items frequently, bathe the cat regularly, and avoid taking it outside until it recovers. If your cat frequently eats meat, it's best to temporarily stop feeding it, especially raw meat.
