Can you get hypothermia from eating just iceypoles?
Highly unlikely. Your core temperature has to drop drastically in order for hypothermia to take place. This would mean being exposed to extreme temperatures for a long period of time. I doubt this would happen from eating icy pops. Hi, Hypothermia is a serious condition and is basically a very significant drop in your body temperature to a very dangerous level. This would not be caused by eating iceypoles but eating iceypoles or anything that is very cold can lower your temperature or make you feel very cold and even shivery.
If you have lost a lot of weight by just eating iceypoles will you put a lot of weight on if you start eating normally again?
In this situation whether or not you start gaining weight again shouldn't be a factor!! Eating nothing but iceypoles is extremely bad for your health. You may prefer the way you look on the outside because of the weight loss but the damage you are doing internally to your body could end up being irreversible. I would recommend going to a doctor, describing your situation to him and asking him to suggest a sensible eating…
The easiest way would be to get out of the cold. Hypothermia can be alleviated somewhat by wearing several layers of clothing, eating more carbohydrates (or more calories generally), and taking cover from the wind. The symptoms of hypothermia can be alleviated by drinking alcohol, but this is actually dangerous because alcohol actually causes death from hypothermia to occur more rapidly by inhibiting the body's protective response.