We Have Two Dwarf Hamsters, a grey one and a black one. The grey one has a huge, pink lump with a scab in the middle on the right side of its belly. The black one has a large, grey spot in the middle of its stomach. If you were to touch it, the hamster would bite you. Do You Have Any Suggestions on what this is and if it is treatable?

The grey one has a little mosquito bite(well not little you said it was) and the other one is infection I know this because my mum is a vet the hamster would bite yes because the things are on the belly and that is a very sensittive to them if you got them to stand on their hind legs and tap the back or their head paw leg o froot they stay standing because those bits aren't sensitive bu if you tap the belly the hamster would fall down