I don't know whether I should try to find a solution or just take him straight to the vet. My kitten is about 12 weeks old and he's not eating as much as he used to in the last couple of days. Today I found a very big bump underneath the corner of his chin. The bump is pretty hard and I don't know if this usually happens for a lot of kittens because he plays roughly with his toys and siblings. I'm not sure if it'll just go away by itself or if I should take him straight to a vet to get him checked. I can't tell if it's a bruise or not. I'm not sure if this would go away or not because if it is, I don't want to scare him by putting him in a cage and drive all the way to the vet since he gets scared of new places easily.