Unsure of whats wrong with my hamster

Question
I have a teddybear hamster she is about 4 months old. She was born from the 2 other hamsters I have and they are of no relation to eachother. She was born fine, but once in awhile will act strangely.Almost like she is a little slower than normal. Earlier yesterday she was walking, and acting fine until a few hours later she began falling over, and falling onto her back. Then she could not get back up right away. Almost as if she has no balance or like her head is to heavy for her body. She had done this once before about a month ago, and I had thought she just had a foot injury until it happened again. She was not dropped or anything. Is it possible she has a problem with her brain or a birth defect?

Answer
Hello Megan,
it sounds like she could be a birth defect or a brain problem or an ear infection. With an ear infection she would be falling a lot more. If he continues to keep falling over, I would take her to a vet just to make sure it's not an ear infection.