There are several reasons for cats scratching their ears:

1. Cat scratching its ears is a habit, which may be a sign of happiness or anger. As long as no obvious foreign matter is found in its ears, there is no need to worry too much. Worry too much.

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.