Cat Ear Burn
Cats have a higher body temperature than humans, so it's normal for their ears to feel hot. If other parts of the cat's body are also hot, it might have a cold or fever, and it's best to take its temperature. When a cat is in heat, the physiological restlessness can also cause its ears to feel hot, which is nothing to worry about. However, ear diseases and feline panleukopenia can also cause a cat's ears to feel hot, so it's recommended to take it to the vet for a checkup.
1. Normal phenomenon
It's usually normal for a cat's ears to feel hot, as cats have a higher body temperature than humans, so owners will feel the heat when they touch their cat's ears. Of course, a cat's ears could also be hot due to overheating, but in this case, it's necessary to consider other symptoms for a proper diagnosis. 
2. Cold and fever
If your cat's heat extends beyond its ears, affecting its belly, paw pads, and other areas, and is accompanied by lethargy and poor appetite, it may have a cold and fever. In this case, you can use an alcohol-sterilized thermometer, inserting it about 5 centimeters into the cat's throat to measure its temperature. If, after three to five minutes, the measured temperature exceeds 39°C, the cat has a fever.
3. Caused by estrus
Owners should also pay attention to whether their cats are in heat. When cats are in heat, physiological agitation causes increased blood circulation, resulting in a flushed face and red ears. This is normal and owners don't need to worry. Having your cat spayed/neutered in time will prevent them from going into heat again.
4. Other reasons
A fever in a cat can also be caused by ear infections, feline panleukopenia, or parasite infections. If the cat is constantly scratching its ears, it may have an ear problem. If the cat is also vomiting and has diarrhea, it may have feline panleukopenia. In these cases, it is recommended to take the cat to a veterinarian for examination to determine the specific cause before taking any treatment.
