Ear mites are tiny crab like parasites that multiply in your cats ear and can cause infection and in extreme cases ruptured ear drums and even deafness.
Diagnosing ear mites can sometimes be tricky as some cats are not bothered by them while others scratch their ears. A cat with ear mites will have a waxy build up and “dirt” in the ears. If you think your cat has ear mites you should get him to the vet as soon as possible for a diagnosis.
To treat ear mites in cats, your vet will clean out the cats ears (don’t try to clean them yourself as you could cause damage to the ear), and then medicate with drops.
These drops should be prescribed by your vet, but you could probably purchase these and other medicines for your cat online with your vets recommendations.
The mites have a 3 week life cycle so it is important that you continue with the drops for 3-4 weeks, otherwise you will not kill all the mites and the infestation will start all over again.
If you have more than one animal you will need to have them all treated as ear mites in cats can spread to the other animals. You should treat them all at the same time to prevent the mites from “moving” from one animal to another in between treatments.