Dear friends please read on. Sorry its long but I have a couple of questions for you near the end. My daughter has had ME for a long time and we have tried many things. We are now trying to dissect the symptoms into their smallest components and are working on them. One of them is this. She often feels cold but if you touch her hand or take her temperature she is not cold. Her internal temperature measuring and signalling system is clearly no good. As a result she often sleeps in many layers of clothes and puts on an electric heated blanket. She often wakes up with a headache. We are now trying to test the hypothesis that the headaches are a result of dehydration during the night as a result of actually overheating event though she does not feel warm, let alone hot. These headaches then trigger a migraine. So if we can help her feel warm without the many layers, causing over heating and hence dehydrating we may be able to prevent the headaches and the resultant migraines. The reason for writing here is (a) to ask if anyone has had anything or thought of anything similar and (b) to ask if anyone knows how we might help my daughter to feel warm throughout the night without wearing multiple layers and using the electric blanket. We will try to introduce drinking more water but of course has the downside of causing multiple trips to the toilet and disturbing sleep. Does anyone know of anything that we can put into water to hydrate her / keep her hydrated and drink less water? Thank you for reading this far. I hope to hear from you.