My Hamster is no longer active at night and does not have much of a appetite
Your hamster may have no energy, when you try to pick them up they will be limp. If they do that, just leave them alone and let them be you might wear them out.
hamsters may die very quickly, they will exhibit signs such as diarrhea (wet tail), lethargy, loss of appetite, and a ruffled coat. Not all hamsters with diarrhea have wet tail but if your hamster has any of these symptoms you should seek veterinary care.