that would depend if the hamster was male or female. Male hamsters should as the lumps are their guy parts.
It is generally not a good sign, it could be cancer, but the only way to know for sure is to take it to the vet as soon as you notice it
It probably means you have a male...the bump is likely to be a testicle
there is no such thing but if you mean a roborovski hamster yes its a dwarf
Well, this is how you say dwarf hamster in japanese- ドワーフハムスター
It could be nothing, but you should take your hamster to see a veterinarian just in case.
If it's a dwarf hamster, it's just boxing. The species tends to do that. It's just their way of playing. If it's not a dwarf hamster then that's strange behavior but i don't think it has rabies
It likely means that maybe your male hamster is not a male,its a female and she is pregnant
unless the tail is wet, that could be fine. its just the way his/her butt is
that some thing is wrong , probably with its kidney's.
That depends on what you mean by White Dwarf Hamster. You may be referring to a Winter White Dwarf Hamster which tend to be a light gray, or a Albino Dwarf Hamster that is completely white and maybe red eyes. Albino Hamsters may be hard to find, but you can call nearby pet stores and ask if they have the hamster you are looking for. (Stores like Pj's Pets, PetSmart, Local Pet Breeds, etc)
Just getting more info about you, or licking salt from your skin.
It means it is getting used to it new home.
You shouldn't even be looking there first of all.
Your hamster is probably a russian winter white dwarf, they change color when it's cold.