What should you know about heat exhaustion nausea?

Nausea may appear with heavy sweating, thirst, headache, dizziness, weakness or cramps after heat exposure. It can make drinking difficult, which may deepen dehydration and delay recovery. Nausea is not specific to heat exhaustion; infection, medication effects and other conditions can feel similar. The timing, surrounding symptoms and response to cooling help a clinician judge the cause.

Stop activity and rest in a cool, shaded or air-conditioned place. Loosen clothing and cool the skin with wet cloths or cool water. When fully alert, take small frequent sips of water or an appropriate rehydration drink. Do not force fluids if vomiting, drowsy or unable to swallow safely. Avoid returning to heat, exercise or alcohol until symptoms have settled.

Get emergency help for confusion, collapse, seizure, fainting, severe weakness, repeated vomiting, inability to drink or rapidly worsening symptoms. Arrange medical advice if nausea continues after cooling, urine becomes very dark, dizziness persists or symptoms return with minor activity. Someone else should monitor you while you recover.

Ask whether you need assessment for dehydration, which fluids are suitable, how to restart activity, and whether any medicine or health condition makes heat exposure more hazardous.