Well, that's not good news.

The weather has been pretty grim lately. And instinctively, we'll all turn to our central heating to help us through this chilly period. However, it seems as though leaving the heat on overnight could be detrimental to our health. Research has shown that almost half of people who sleep with their heating on overnight report feeling sick the next day. A survey found that 46 percent of people who slept with their heating on felt sick in the morning, with 37 percent reporting symptoms including headaches, dry mouths and dehydration. Been there, but hun, it beats pneumonia. One in five people also said they wake in the middle of the night in an awful sweat. According to Professor Jason Ellis: "Our bodies do a great deal of work for us during sleep. As part of that process, our body temperature changes over the course of the night and we tend to cool down towards bedtime and then naturally warm up towards the morning." "As such, we may go to bed warm and cosy but as the research shows, wake up hot and bothered. The key is being comfortable when going to bed and staying comfortable throughout the night." "The more comfortable you are the less likely you will wake during the night or too early in the morning." Crack a window or something, maybe?