The reasons why cats vomit and refuse to eat for several days: 1. There are parasites in cats that live in the gastrointestinal tract and can easily cause vomiting and diarrhea. 2. Cats may vomit after eating unclean or toxic substances, which may affect liver and kidney functions in severe cases. 3. Cats may suffer from other diseases, such as feline distemper, gastroenteritis, pancreatitis, etc. 4. Cat vomiting may be due to hairball syndrome.

What to do if a cat vomits and does not eat for several days in a row:

1. If the vomiting and diarrhea are caused by internal parasites, the owner needs to go to the pet hospital in time for reasonable treatment. Use anthelmintics;

2. If the vomiting is caused by a digestive tract disease, you need to see a doctor in time to find the lesion and then treat it symptomatically.

3. Poisoning causes the cat to vomit. In this case, the cat needs to be taken to the pet hospital for treatment as soon as possible.

4. Cat vomiting may be due to hairball syndrome. When a cat licks and cleans its fur, it will lick the hair into its belly, causing hairballs. Cats need to be fed cat grass or hair removal cream regularly.

5. It needs to be sent to the pet hospital immediately for treatment with intravenous electrolyte and nutrient solution.