When to see a doctor

If you have signs of heatstroke, you'll need immediate medical help. If your core temperature is less than 104 F (40 C), but it doesn't come down quickly, you'll also need urgent medical attention. In some cases, you may need fluids through intravenous (IV) tubes if you're not able to drink fluids, or not able to drink enough fluids.

Get cleared by your doctor before you return to exercise if you've had heatstroke. Your doctor will likely recommend that you wait to return to exercise or sports until you're not experiencing symptoms. If you've had a heatstroke, you may require many weeks before you are able to exercise at a high level. Once your doctor clears you for exercise, you may begin to exercise for short periods of time and gradually exercise for longer periods as you adjust to the heat.