I don't know how to categorize this. I have been experiencing this for almost 5 years now. It might be a rainy day and I will start shivering or it might be warm and sunny, suddenly it becomes cloudy and rains.. Then I will start shivering.. I cannot control it and it will go away after being in blanket or hugging someone for some minutes or sometimes even hours.. V live in a warm place and when it rains normally ppl won't even feel cold.. And I haven't seen anyone shivering due to rain.. But I do !! What can this be.. This isn't due to fever or tension or anything... Today it rains I will shiver.. Tmrw again if it rains.. I will again shiver.. It just continues.. Can u suggest some reason?