Red spots on cats’ ears may be caused by allergies, ear mites, or mosquito bites. First, check the allergens, eradicate them in time, and deworm the cat regularly. Do not bathe the cat for a few days before and after deworming to avoid affecting the efficacy of the medicine. . If a cat has ear mites, it needs to be taken to a pet hospital for examination and treatment. During this period, attention should be paid to supplementing the cat's nutrition to promote the cat's physical recovery.