If your cat smells mosquito coils all night, the first thing you need to do is to remove the cat from the mosquito coil environment as soon as possible and make sure it breathes fresh air. Chemicals in mosquito coils, such as pyrethrins, are harmful to cats’ health and may cause symptoms of poisoning such as watery eyes, sneezing, and runny noses, and may even affect the cat’s liver and nervous system.

Next, you need to observe the cat's condition. If the cat shows symptoms of poisoning such as vomiting, diarrhea, convulsions, or is in a poor mental state or has a loss of appetite, it should be sent to a pet hospital for treatment immediately. The doctor may use intravenous infusion to help the cat eliminate toxic substances from the body, and may also give some liver-protecting drugs.