The common human body functions best when its body temperature ranges between 36°C and 37°C (98.6°F). When body temperature becomes a little too cold or too hot, it can disrupt normal body functions and even become life-threatening. Two of the most important medical conditions that are related to abnormal body temperature are Hyperthermia and Hypothermia.
Although these conditions are very different in terms of temperature changes, both can affect the body's organs, brain function, and overall survival. Understanding their effects, symptoms, and prevention is crucial for everyone.
What is Hypothermia?
Hypothermia occurs in the body when the body loses heat faster than it normally does, causing the body temperature to fall below 35°C (95°F). This loss of temperature affects the body's ability to build the ability to perform some of the essential functions that are important for circulation, breathing, and brain activity.
It is important to remember that anyone can become hypothermic. Anyone is susceptible to Hypothermia. If they meet the given conditions:
- Exposure to cold environments.
- Exposure to severe winter weather
- Prolonged immersion in frigid water
Causes of Hypothermia
Several factors can contribute to the onset of Hypothermia
1. Mild Hypothermia (core temperature between 32ºC and 34ºC (90ºF and 93ºF))
- Shivering
- Inability To Speak / Slurred Speech
- Mental Confusion / Agitation
- Low Body Temperature, Cold Skin
- Decreased Pupillary Reaction to Light
2. Moderate to Severe Hypothermia (core temperature below 32ºC (90ºF))
- Absence of Shivering / Cold Stiff Body
- Decreased Level of Consciousness
- Weak / Irregular Pulse
- Poor Circulation / Blue Colour
- Difficulty Breathing / Low Blood Pressure
- Pupils Dilated / Non-Reacting
3. Signs of Imminent Death
- Weak / Irregular Pulse
- Poor Circulation / Blue Colour
- Difficulty Breathing / Low Blood Pressure
- Pupils Dilated / Non- Reacting
How to Recognize the Symptoms of Hypothermia?
- Cold skin
- Slowed/slurred speech
- Slow, shallow breathing
- Weak, slow pulse
- Shivering or tremors in hands, arms/legs
- Agitated, lethargic, or confused
- Diminished movement on one side of the body
- Seeming unaware of surroundings
- Physical or emotional distress
If someone shows any of these signs/symptoms or exhibits loss of consciousness, find medical help as soon as possible. If treated early, Hypothermia can be reversed before permanent damage occurs.
How to Prevent Hypothermia?
There are different ways to prevent Hypothermia. Some ways include:
1. Maintain a steady core body temperature:
- Wear adequate clothes for outdoor activity, including hats & gloves.
- Keep dry and limit the time spent in cold weather.
- Don't become too warm/cool before going outside.
- Use your body heat to warm up.
2. Stay dry:
- Change out of wet clothes & keep dry as much as possible.
- Dry shoes before using them again, either indoors or outside.
- Use appropriate footwear (e.g., boots) when participating in cold-weather activities.
3. Avoid dehydration:
- Drink plenty of fluids outdoors.
- Limit the amount of alcohol consumed while participating in outdoor activities.
What is Hyperthermia?
Hyperthermia is caused by being in a high amount of heat, and this can be, for example, by the amount of heat being generated inside your body or the actual outside temperature.
Hyperthermia can also occur from extreme physical workload, dehydration, or working in heat. Unlike fever, where a body's temperature will increase due to an infection, Hyperthermia is due to the body not being able to regulate its own body temperature anymore.
Types of Hyperthermia
Hyperthermia occurs in several forms. Some of them include:
Heat Cramps:
Painful cramps in muscles are caused by heavy sweating, leading to a loss of salt and other electrolytes in the body.
Heat Exhaustion:
A condition characterized by excessive sweating, weakness, dizziness, and nausea caused by prolonged exposure to heat.
Heat Stroke:
Heat stroke is the most serious type of Hyperthermia and occurs when the body's temperature rises above 40°C (104°F), resulting in the body's inability to control its heat.
Heat stroke is a medical emergency that requires immediate treatment.
Causes of Hyperthermia
Hyperthermia can occur for such reasons:
- Exposure to hot weather for an extended period of time
- Extremely high humidity levels
- Dehydration
- Excessive physical activity or exertion
- Wearing clothes that are too heavy or protective
- Too little ventilation in a closed space
Athletes, outdoor workers, and the elderly are at higher risk for Hyperthermia than other groups of people.
Symptoms of Hyperthermia
The symptoms depend on the degree of severity of Hyperthermia and may include the following:
- High Body Temperature
- Excessive sweating (dry skin in the case of heat stroke)
- Headache
- Dizziness
- Rapid heartbeat
- Nausea and/or vomiting
- Confusion or disorientation
- Loss of consciousness
If Hyperthermia is not treated, it can lead to damage to the brain, heart, kidneys, and muscles.
How to Treat and Provide First Aid for Hyperthermia?
Cooling the body as soon as possible is the most critical aspect of treatment.
The following steps should be taken when providing first aid for Hyperthermia:
- Move the person into a cool (shady) area of the place in which they are located.
- Remove any excess clothing from the person.
- Apply cold compresses or ice packs to the person's body.
- Give the person water or a sports drink with electrolytes, if possible.
- Use a fan or provide cool showers.
If the victim of Hyperthermia is suffering from heat stroke, emergency medical assistance must be sought immediately. Waiting to treat the victim increases the chances of death or organ failure.
Key difference between Hypothermia and Hyperthermia
|
Feature |
Hypothermia |
Hyperthermia |
|
Temperature |
Too low |
Too high |
|
Cause |
Exposure to cold |
Exposure to heat |
|
Body Temperature |
Below 35°C |
Above 37.5–40°C |
|
Main Risk |
Freezing conditions |
Heat waves or intense activity |
|
Common Symptoms |
Shivering, confusion |
Sweating, dizziness |
|
Severe Outcome |
Cardiac arrest |
Heat stroke and organ damage |
Forensic and Medical Science: Importance of Hypothermia and Hyperthermia
Hypothermia and Hyperthermia knowledge are very important in forensics and medical science.
The determination of the cause and manner of death may rely upon the adverse temperature that may or may not have caused the death.
Examples of Hypothermia deaths may include the following:
- Paradoxical Undressing.
- Frostbite.
Examples of Hyperthermia deaths may include the following:
- Severe dehydration.
- Organ failure.
- Heat stroke indicators.
To establish a cause of death, the Forensic pathologist must examine the environment, the decedent's medical history, and the decedent's body.
Temperature Prevention:
In many cases, Hypothermia and/or Hyperthermia can be prevented by taking simple precautions.
Hypothermia: To Prevent Hypothermia, You Should:
- Wear clothes that are warm and layered.
- Keep your clothes dry.
- Do not drink alcohol while in cold weather.
- Stay as active as possible to maintain your body temperature.
- Seek shelter from the extreme cold.
Hyperthermia: To Prevent Hyperthermia, You Should:
- Drink plenty of fluids.
- Avoid heavy exercise during the heat of the day.
- Wear light and airy clothes.
- Take plenty of breaks.
- Stay in the shade and/or have access to cool areas.
- Use fans and/or have access to air conditioning when possible.
Conclusions
Hypothermia and Hyperthermia represent two different but equally serious disruptions in the way in which the body maintains its internal environment via temperature regulation.
Hypothermia occurs when the body becomes very cold and loses heat very rapidly.
Conversely, Hyperthermia occurs when the body becomes overheated and is unable to cool itself down well.
If either Hypothermia or Hyperthermia is not identified and treated immediately, serious complications, including death, can occur. As such, both the medical community and health science/forensic science and emergency care students must understand the causes and symptoms of Hypothermia and Hyperthermia and how to prevent them as climate change continues and extreme climate events continue to increase.