3. Sunstroke Sign #1: Throbbing Headache
One of the first signs of too much sun is a throbbing headache. It generally has the rhythm of a drumbeat. The pain will get more intense in bursts, with periods of less-intense pain between. If you feel pulsing at the temples or across the forehead, it could be a warning sign that you’ve had too much sun.
If you get a throbbing headache, get out of the sun immediately. If you can’t go indoors, at least go to a shady area. Try putting a cold cloth across your forehead or rubbing an ice cube from temple to temple. Drink as much water as you can. Dehydration is a major factor in sunstroke/heat stroke.