Overview
Heat exhaustion is a condition that occurs when the body overheats. Heavy perspiration and a fast heart rate are two possible symptoms. Heat exhaustion is one of the three heat diseases. Heat cramps are the most mild kind of heat sickness. Heatstroke is the most severe.
Heat sickness is caused by exposure to high temperatures, especially when combined with excessive humidity, and strenuous physical activity. Without timely treatment, heat exhaustion can progress to heatstroke, a potentially fatal illness. Fortunately, heat exhaustion is preventable.
Symptoms
Heat exhaustion symptoms may appear quickly or gradually, particularly after extended exertion. Heat exhaustion symptoms could include:
When exposed to heat, the skin becomes cool and damp, with goose bumps.
Excessive perspiration.
Faintness.
Dizziness.
Fatigue.
Weak, fast pulse.
Standing lowers blood pressure.
Muscle cramping.
Nausea.
Headache.
When to visit a doctor.
If you believe you have heat exhaustion:
Stop all activities and relax.
Move to a cooler location.
Drink cold water or sports drinks.
Contact your doctor if your symptoms worsen or do not improve within an hour.
If you are with someone who is experiencing symptoms of heat exhaustion, seek immediate medical attention if the person becomes confused or frightened, loses consciousness, or is unable to drink. If the person's core body temperature, as measured by a rectal thermometer, rises to 104 degrees Fahrenheit (40 degrees Celsius), seek immediate medical attention. The person requires rapid cooling and medical treatment.
Causes
Your body's core temperature is affected by both its own heat and the heat of the environment. This is your body's internal temperature. Your body must balance heat intake in hot weather and heat loss in cold weather in order to maintain a normal core temperature. The typical core temperature is approximately 98.6 degrees Fahrenheit (37 degrees Celsius).
When your body cannot cool itself
In hot conditions, your body cools itself mostly through perspiration. Sweat evaporates and maintains your body temperature. However, when you exercise intensely or overexert in hot, humid weather, your body is less able to cool itself effectively.
As a result, heat cramps may develop in your body. Heat cramps are the mildest type of heat sickness. Heat cramps are characterized by excessive sweating, weariness, thirst, and muscle cramps. Prompt treatment may keep heat cramps from escalating to a more serious type of heat disease, such as heat exhaustion.
Drinking electrolyte-containing beverages or sports drinks (such as Gatorade and Powerade) can help relieve heat cramps. Other treatments for heat cramps include moving to a cooler environment, such as an air-conditioned or shaded area, and relaxing.
Other causes
Aside from hot temperatures and strenuous activities, other causes of heat exhaustion are:
Dehydration reduces your body's capacity to sweat and maintain a normal core temperature.
Alcohol usage might impair your body's capacity to regulate temperature.
Overdressing, especially in clothes that do not allow sweat to dissipate quickly.
Risk Factors
Anyone can develop heat illness, but certain circumstances make you more sensitive to heat. They include:
Young or elderly age. Infants, children under the age of four, and people over the age of 65 are more likely to get heat exhaustion. Children's ability to regulate their body temperature is not fully developed. In older adults, illnesses, medications, and other conditions might impair the body's capacity to regulate temperature.
Some medicines and pharmaceuticals. Certain medications can impair your body's capacity to stay hydrated and respond appropriately to heat. Beta blockers and diuretics are two examples of medications used to treat high blood pressure and cardiac diseases. They include antihistamines, which are medications used to relieve allergic symptoms. They include tranquilizers, which are drugs that calm you down. They also include antipsychotics, which are medications that alleviate psychiatric symptoms such as delusions. Some illegal drugs, including cocaine and amphetamines, can raise your core temperature.
Obesity. Carrying excess weight might impair your body's capacity to regulate temperature, causing your body to retain more heat.
Temperatures suddenly alter. If you are not accustomed to the heat, you are more vulnerable to heat disorders such as heat exhaustion. The body needs time to adjust to greater temperatures. Traveling from a cold region to a warm one, or residing in a location that suffers an early heat wave, can increase your chance of developing a heat illness. The body hasn't had a chance to adjust to the greater temperatures.
An elevated heat index. The heat index is a single temperature figure that takes into account how the outside temperature and humidity affect you. When the humidity is high, your sweat does not evaporate as rapidly, and your body has greater difficulty cooling itself. This increases your risk of heat exhaustion and heat stroke. If the heat index is 91 degrees Fahrenheit (33 degrees Celsius) or greater, take care to stay cool.
Complications
If heat exhaustion is not treated, it can develop into heatstroke. Heatstroke is potentially fatal. It occurs when your core body temperature hits 104 degrees Fahrenheit (40 degrees Celsius) or above. Heatstroke necessitates quick medical attention to avoid lasting damage to your brain and other essential organs, which can be fatal.
Prevention
You can avoid heat exhaustion and other heat disorders. When temps rise, remember:
Wear loose-fitting, light clothing. Wearing too much clothing or clothing that fits tightly will prevent your body from cooling adequately.
Prevent sunburn. Sunburn impairs the body's ability to cool itself. Wear a wide-brimmed hat and sunglasses when spending time outside. Use a broad-spectrum sunscreen with a minimum SPF of 30. Apply sunscreen liberally, and reapply every two hours. Reapply more frequently if you're swimming or sweating.
Drink plenty of liquids. Staying hydrated allows your body to sweat and prevents your body temperature from going too high.
Exercise caution when taking certain medications. Keep an eye out for heat-related problems if you use medications that can impair your body's capacity to stay hydrated and respond to heat.
Never leave someone in a parked automobile. This is a common cause of heat-related death among children. When an automobile is parked in the sun, the temperature inside can climb by 20 degrees Fahrenheit (more than 11 degrees Celsius) in ten minutes. Keep parked cars locked to prevent children from entering.
Take it easy during the hottest hours of the day. If you can't avoid strenuous activities in hot weather, stay hydrated and rest frequently in a cool location. Try to arrange exercise or physical labor at cooler times of the day, such as the early morning or evening.
Get accustomed. Limit your time working or exercising in the heat until you've become accustomed to it. People who are not accustomed to hot conditions are more susceptible to heat illness. It may take many weeks for your body to adapt to hot weather.
Be cautious if you are at a higher risk. Be cautious if you take medications or have a condition that puts you at risk for heat-related problems, such as a history of previous heat illness. Avoid the heat and respond swiftly if you feel any signs of overheating. If you participate in a difficult sporting event or activity in hot weather, ensure that medical services are available in case of a heat emergency.
