The temperature can also be tricky. In hot places, it isn't only sunburn you have to worry about. If you're also using up a lot of energy during the day, you can suffer from heat exhaustion because your body runs short of water or salt. You have to drink plenty of water in hot places, especially after exercise, and you must take in extra salt (either in food or pill form). If you are in very hot temperature and a headache. Anybody with heatstroke must get medical help immediately.