<s>[INST] Today I went fishing. I have not seen a doctor or anything yet, and I am worried. I was down on cements in the beaming sunlight upper 90 degrees, then I felt dizzy. I fell, and got up off the ground after a few minutes and made my way back to my truck. I felt better soon after. I am thinking it was a sugar drop, but I had drunk a Diet Mountain Dew and a Pepsi, meaning I dont think it went down. Also the last time I visited a doctor, about two months ago, my blood pressure was normal. [/INST] Hither are various reasons for dizziness and one of the common cause is heat stroke. As you said you went to fishing and was exposed high sunlight, it may be one of the possible cause briefly tell you, heat stress occurs when the body cannot cool itself enough to maintain a healthy temperature. Heat-related illnesses include heat rash, heat cramps, dizziness or fainting, heat exhaustion, heat stroke, and a worsening of existing medical conditions. Overexertion in hot weather, sun or bushfire exposure, and exercising or working in hot, poorly ventilated or confined areas can increase your risk of heat stressSuggest -your self with thin clothing next time when you go out to fishing also try to be in the shade or can use portable land umbrellas Chat Doctor.  </s>