How common is excessive sweating in heat exhaustion?

Heat exhaustion can also bring weakness, dizziness, headache, nausea, muscle cramps, thirst and cool, clammy skin. The person may feel faint or unusually tired. Heavy sweating alone has many possible explanations, including a warm environment, exercise, anxiety, medicines or a sweating disorder; it does not establish the cause by itself.

Move to a cool or shaded place, loosen extra clothing and rest. Cool the skin with wet cloths, a fan or a cool shower. If the person is awake and able to swallow, offer small, frequent sips of water or an oral rehydration drink. Stop exertion and avoid returning to heat until fully recovered.

Seek emergency help if there is confusion, loss of consciousness, a seizure, inability to drink, worsening symptoms or very hot skin. These signs can indicate heatstroke or another serious problem. If symptoms do not improve promptly after cooling and fluids, arrange urgent medical assessment.

Ask what likely triggered the episode, whether dehydration or a medicine contributed, and how to return safely to activity. Mention any repeated episodes, faintness, chest symptoms or sweating that happens outside heat and exercise.