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- Intense exercise, high temperatures and humidity, dehydration, and some medications and health conditions can cause a sudden rise in body temperature.
- No food can rapidly lower your core body temperature. However, foods rich in water and electrolytes may help support the body’s natural heat regulation.
- You should seek medical help if you experience confusion, fainting, persistent vomiting, a very high body temperature, or loss of consciousness due to heat.
You may experience a sudden rise in body temperature when your body produces or absorbs more heat than it can lose. Some foods can support the body’s heat regulation by providing water and electrolytes.
1. Watermelon

Eating fruits can support hydration because many fruits have high water content and contain some electrolytes. Watermelon is very hydrating, with about 90% water content.
However, some fruits are higher in natural sugar. Watermelon contains around 10 grams of sugar per 150-gram serving. Being mindful about portion size can help you keep your sugar intake in check.
2. Cucumber

Cucumber is about 96% water. It makes a great snack on its own or in salads for its crunch and freshness.
3. Strawberry

Strawberries are a lower-sugar fruit containing about 90% water.
A 140-gram serving of strawberries also provides about 80–85 milligrams of vitamin C, which is roughly 90–100% of the daily need for most adults.
4. Coconut Water

Coconut water is about 95% water and naturally contains a small amount of sugar, around 2.6 grams per 100 grams. It also contains small amounts of electrolytes such as potassium, sodium, and magnesium.
On hot summer days, coconut water is a great alternative to sugar-sweetened drinks like soda, as it provides hydration and electrolytes.
5. Greek Yogurt

Greek yogurt is a high-protein food with about 81% water content. It also provides minerals such as potassium and calcium.
Greek yogurt also freezes well. You can mix it with fruits, nuts, or cacao and matcha, then freeze it to make a refreshing snack.
6. Lettuce

Lettuce is an easy-to-digest leafy green with about 94% water content. You can add lettuce to salads, put it on sandwiches, or use it for wrapping foods.
7. Tomato

Tomatoes are about 95% water. You can use them in soups, salads, and sauces. They contribute to your fluid intake while adding flavor to meals.
8. Broth

Vegetable or chicken broth adds a lot of flavor to meals and is mostly water. You can use it in soups or cold-served dishes.
What Causes Sudden Body Heat
Many factors can cause heat stress, including:
- Hot or humid weather
- Intense physical activity
- Dehydration
- Wearing heavy or non-breathable clothing
- Being in enclosed hot spaces
- Certain medications
- Medical conditions that affect sweating or circulation
When To Seek Medical Attention
An increase in body heat can cause heavy sweating, muscle cramps, and spasms. You should move to a cooler location, drink water or clear juice, and stop activities for a few hours. If symptoms do not go away, it can escalate to heat exhaustion and heat stroke.
Heat Exhaustion
Mild heat stress can escalate to heat exhaustion. You should seek medical attention if you experience:
- Dizziness
- Fainting
- Weakness
- Fatigue
- Irritability
- Headache that does not improve
- Nausea or vomiting
- Muscle cramps that do not go away
- Heavy sweating
- Rapid heartbeat
You can lie down, change into lightweight, breathable clothes, sip cool water, move to an air-conditioned environment, or take a cool shower to ease symptoms.
You should seek medical help if your symptoms do not improve within an hour or worsen.
Heat Stroke
Heat exhaustion can worsen into heat stroke, a medical emergency that can lead to organ damage. You should seek emergency medical help if you experience:
- Body temperature above 104°F (40°C)
- Throbbing headache
- Confusion
- Loss of consciousness
- Very hot, dry skin or stopped heavy sweating
- Seizures
Heat stroke is a medical emergency, so you should call emergency services immediately.
While waiting for medical help, you can help the person by moving them to a cooler place, removing excess clothing, and using cool water or a cool bath to help lower body temperature.
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