The reasons why cats scratch their ears:

1. Cats scratching their ears is a habit. It may be a sign of happiness or anger, as long as there is no obvious sign in its ears. There is no need to worry too much if there are any foreign objects.

2. It may be caused by ear mites. If there is dark brown secretion in the ear canal, then it is ear mites, and the cat needs to be treated with ear cleaning solution regularly.

3. It may be caused by cat moss. If there is redness, swelling, hair loss, dandruff, scabs, etc. around the ears, then it is cat moss. You can use fungal medicine on the affected area.

Symptoms of ear mites in cats:

1. Itching: Once a cat suffers from ear mites, its ears will be itchy and unbearable, and it will constantly scratch its ears. Or keep shaking their heads and rubbing their heads on the floor. If you find that your cat has these symptoms, it may have suffered from ear mites;

2. The earwax color is strange: If the cat’s earwax is dark brown or black It is waxy and difficult to clean off, so it can be basically confirmed that it is ear mites;

3. Cat ears have a peculiar smell: healthy cat ears have no smell, but the ears of cats with ear mites have a special smell. The unpleasant sour odor can be smelled when you are close to the cat in severe cases. In this case, the cat's ear mites are already serious.