How common is headache in heat exhaustion?

In hot conditions, sweating removes water and salts while the body works to cool itself. Dehydration and changes in circulation can cause head pain, dizziness, weakness, nausea, thirst, heavy sweating, clammy skin, and muscle cramps. Symptoms often follow exercise, outdoor work, or time in a hot, poorly ventilated place.

Headache alone cannot identify Heat Exhaustion. Migraine, infection, medication effects, and other problems can feel similar. Heat exhaustion can worsen into heat stroke, particularly when the person becomes confused or stops sweating, so the whole symptom pattern matters.

Stop activity and move into shade or an air-conditioned space. Lie down with the legs raised slightly if you feel faint, loosen extra clothing, and cool the skin with wet cloths or a fan. Sip cool water or an oral rehydration drink if you are awake and able to swallow. Avoid alcohol and return to exertion only after you have fully recovered and received appropriate advice.

If symptoms do not start improving with cooling and fluids, contact a healthcare professional promptly. People who are pregnant, older, very young, or living with heart, kidney, or other long-term conditions may need tailored fluid advice.

Call emergency services for confusion, unusual behaviour, collapse, seizure, difficulty breathing, inability to drink, or a very high body temperature. These signs may indicate heat stroke, which can damage organs quickly and needs immediate treatment.

Do not give fluids to someone who is confused, vomiting repeatedly, having a seizure, or unable to swallow safely. Keep cooling them while waiting for help. A severe or sudden headache, fainting, chest pain, or ongoing weakness also warrants urgent assessment.

Ask: Were my symptoms consistent with Heat Exhaustion or heat stroke? How should I replace fluids and salts? When is it safe to work or exercise in heat again? Do my medicines or health conditions change my risk or fluid plan?