Diarrhea due to heat

Sweating and diarrhea can remove water and salts together. Heat Exhaustion may cause heavy sweating, weakness, headache, nausea, dizziness and thirst; diarrhea can add to that fluid deficit. Heat itself is not the only explanation: contaminated food, a stomach infection or a medicine reaction can occur during hot weather too. Dark urine, reduced urination and worsening fatigue suggest that the body is not replacing fluid adequately. Heat Intolerance that occurs repeatedly without a clear exposure deserves a separate clinical review.

Move indoors or into shade, loosen extra clothing and use cool wet cloths or a fan. Sip an oral rehydration solution and take small amounts often, especially if your stomach feels unsettled. Stop strenuous activity and avoid alcohol. Eat light foods when ready. Note the heat exposure, time symptoms began, sweating, urine changes and any shared meal or sick contacts; those details help distinguish heat illness from infection. Do not return to strenuous heat exposure until you feel recovered.

Call emergency services for confusion, seizure, collapse, loss of consciousness, very hot skin or trouble breathing. Seek prompt care if cooling and drinking do not improve weakness or dizziness, if urine becomes very dark or scarce, or if stool contains blood or severe abdominal pain develops. A headache that is sudden, severe or associated with neurological symptoms also needs urgent assessment.

Was my illness more consistent with heat exhaustion, dehydration or an infection? What rehydration plan fits my health conditions? When can I safely exercise outdoors again? Should recurring heat symptoms be investigated?