Why Are Hamsters So Stupid Im Very Worried About My Hamster Please Help, And No Stupid Hamsters This Is Serious?

Im very worried about my hamster please help, and no stupid hamsters this is serious? - why are hamsters so stupid

My hamster is 2 years, and he loses the skin. Is widespread. But I do not understand why it is the development of a variety of injuries throughout the body. Appear in the legs, back, chest, and now the nose. I thought it was a cage, then I have it in his cage, an aquarium with nothing more in him. I gave a soft bed. No idea what happened to my friend?