[LunaTheHamster1]

This sounds more like a concussion/contusion type of accident. Your hamster may need some pain medication like Cypher has already said.

Depending on what type of cage you have, you maybe want to try and keep all his things on one level, so easy access to food and water, he may need his wheel taking out, if he is still wobbling about, it is best to reduce the chances of him falling off anything in his cage.

Maybe a good thing to try in future with him is to have a run set up, such as a large box, then he gets to have time out of his cage but less chance of him having an accident and it just makes keeping an eye on them easier.

I hope you can get him some help and he recovers soon. It took my hamster about 5 days for him to start coming around after a horrible accident but he did go the vets, twice and I think this saved his life.