Dd was out for sea walk in hot pants and vest top - didn't see any one else without a coat. At home this weekend she was only in knickers whilst rest of family in fleeces as not a warm house. In summer she passes out/vomits/gets heat stroke if she does sport in the heat but is healthy the rest of the year. She dreads summer and hates the heat. Is there a condition where you cant regulate body temperature? Is it something to ask GP? Concerned they will think I am wasting their time as she is fit and healthy most of year but we get continual comments at lack of coat/fleece especially going to school and summer is a nightmare as she wants to do competitive sports but gets heat stroke. Any one experienced this?