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Hi, I'm Dr. Vaino. At first glance this sounds like a possible vestibular problem. When you say bright pink skin, do you mean no hair?
Bright pink is normal for a hamster. Vestibular signs are a result of imbalance that happens, typically, with an infection in the inner ear. It sounds to me like some antibiotics might be something to try.
I think you need a vet. If there is an ear infection, the vet can discover this by sampling the ear with a q-tip and examining the sample under a microscope. If this is the case, typically topical otic (ear) antibiotics are needed, which are not available without a prescription. I would be careful of using anything with a corticosteroid in it, however, as a hamster is a very small animal and the corticosteroids can be absorbed into the body, which can cause a hormonal imbalance. A vet with experience in small rodents will know this, though.
If things are severe enough, systemic (whole body) antibiotics may also be needed, but again, make sure you chose a vet with experience in small rodents so that the correct antibiotic is chosen. Certain antibiotics can be harmful to these species.