Hypothermia: Signs, Symptoms, Causes, and Treatment

Winter air can be peaceful and quiet. Many people enjoy the crisp feeling of a cold morning or the beauty of a snowy landscape. But the cold holds a danger that can catch anyone off guard. It affects the way your body works from the inside out. This condition is known as hypothermia. It is not just something that happens to mountain climbers or people in the Arctic. It can happen in a cold house or during a rainy afternoon. Understanding how your body reacts to low temperatures is the first step in staying safe.

In this blog, we will explore how the cold impacts the body and how you can stay safe. We will look at the warning signs that indicate a medical emergency. You will learn about the different stages of the condition and the steps you can take to prevent it. We will also discuss who is most at risk and what to do if someone needs help. This guide is meant to help you recognise the signs and symptoms of hypothermia before they become a serious threat to your health.

What Is Hypothermia?

This is a medical emergency that occurs when your body loses heat faster than it can produce it. A normal body temperature is around 98.6 degrees Fahrenheit. When this temperature drops below 95 degrees, the condition has set in. Your heart and your nervous system cannot function normally at such low temperatures. Your organs begin to struggle. If the core temperature continues to drop, it can lead to complete heart failure. It can also lead to the failure of the respiratory system. This condition is dangerous because it often happens slowly. A person might not realise they are in trouble until their brain stops working correctly. Once the brain is affected, the person cannot think clearly or take steps to get warm. This makes it a silent and very deadly threat during cold seasons.

Difference Between Hypothermia And Hyperthermia

It is easy to get these two terms confused because they sound similar. However, they are opposite conditions that affect the body in different ways. One involves being too cold, while the other involves being too hot. Both are dangerous and require immediate attention. Understanding the difference helps you provide the right kind of help in an emergency.

What Are The Symptoms Of Hypothermia?

The way the body reacts to the cold changes as the internal temperature drops. It is helpful to think of these changes in stages. Being able to identify the signs and symptoms of hypothermia early can prevent the condition from becoming fatal.

Mild hypothermia

• The person begins to shiver uncontrollably as the body tries to create heat.
• They may feel exhausted for no clear reason.
• Dizziness is common during this early stage.
• The person might feel a strong sense of hunger or nausea.
• Their speech might become slightly slurred or slow.
• They may have trouble using their hands for simple tasks.
• The pulse rate usually increases as the heart works harder.

Moderate hypothermia

• Shivering may become more violent or suddenly stop entirely.
• The person will likely act very confused or disoriented.
• They might start to mumble or talk in a way that does not make sense.
• A feeling of extreme sleepiness or drowsiness often sets in.
• The person may show a lack of concern about their own safety.
• Breathing becomes slower and shallower.
• The pulse starts to weaken and slow down.

Severe hypothermia

• The person may lose consciousness and stop responding to voices.
• The skin can turn blue and feel very cold or even hard to the touch.
• Pupils in the eyes may become fixed and dilated.
• Breathing might be so shallow that it is hard to notice.
• The pulse may be irregular or very difficult to find.
• The person might appear to be dead even if they are still alive.
• Muscle coordination is completely lost, and the body may become stiff.

What Causes Hypothermia?

The most common cause is exposure to cold weather without enough protection, such as staying outside too long in winter or wearing clothes that are not warm enough for wind and snow. Wind increases heat loss by removing the body’s natural layer of warm air. Wetness makes the risk worse because water takes heat away from the body much faster than air, whether from falling into cold water, getting wet in rain or snow, or sweating inside winter clothing, which can quickly make you very cold.

Who Are The Most Vulnerable?

Some people struggle more than others to maintain body temperature, especially due to age, health, or lifestyle factors. Knowing the signs and symptoms of hypothermia is important when caring for these high-risk groups.

Older people

With age, metabolism slows, and body fat may decrease, making it harder to stay warm. Certain medical conditions can reduce shivering, and some older adults may not feel cold quickly, increasing their risk of prolonged exposure.

Young children

Children lose heat faster because of their smaller bodies and larger skin surface area. They may ignore early warning signs and continue playing outside even when they are getting too cold.

Babies

Infants are especially vulnerable because they cannot move to generate heat or shiver effectively. A cold sleeping environment can quickly lower their body temperature, so keeping them warm and watching for signs like cold skin or weak crying is essential.

Outdoor seekers

Hikers or hunters may face sudden weather changes, get lost, or become fatigued. Without proper gear and rest, their ability to produce heat drops, increasing the risk of cold injury.

Substance users

Alcohol and some drugs interfere with temperature regulation and judgment. Alcohol may create a false feeling of warmth while actually increasing heat loss, raising the danger of collapsing in the cold.

Homeless people

Lack of shelter, warm clothing, and dry spaces exposes homeless individuals to cold for long periods, making them one of the most vulnerable groups in winter.

Mental health conditions

Some mental health issues can affect judgment, leading people to dress inappropriately for the weather or stay outside too long without recognising the danger.

Medical conditions

Conditions such as hypothyroidism or diabetes can reduce heat production or sensation, meaning cold exposure may go unnoticed until harm occurs.

Medication users

Certain antidepressants, antipsychotics, and sedatives can interfere with temperature control or awareness, increasing risk in cold weather.

What Are The Complications?

If the body stays cold for too long, several serious problems can happen. These complications can cause permanent damage or lead to death.

• Frostbite occurs when the skin and the tissue underneath actually freeze.
• Gangrene can happen if the blood flow to a limb is cut off for too long.
• Heart rhythm problems can lead to sudden cardiac arrest.
• Kidney damage may occur as the body tries to process the stress of the cold.
• Pneumonia is a common risk after the lungs have been exposed to extreme cold.
• Death is the final complication if the core temperature is not raised in time.

How Is Hypothermia Diagnosed?

A doctor will usually diagnose this condition based on a physical exam and a temperature reading. A standard thermometer might not be able to read very low temperatures. Doctors often use a special rectal thermometer to get an accurate core temperature. They will also look for the physical signs and symptoms of hypothermia, like confusion or shivering. They may order blood tests to check for infections or to see how the organs are functioning. Checking the heart rhythm is also a standard part of the diagnosis process in a hospital.

How Is Hypothermia Treated?

Treating this condition requires a very gentle approach. If you move a cold person too roughly, you could trigger a heart attack. The goal is to raise the body temperature without shocking the system.

• Move the person out of the cold and into a warm room as soon as possible.
• Remove any wet clothing and pat the skin dry with a towel.
• Wrap the person in layers of dry blankets or warm coats.
• Cover the head and the neck to prevent further heat loss.
• Use skin-to-skin contact if blankets are not available.
• Give the person warm and sweet drinks if they are conscious and able to swallow.
• Avoid giving the person any alcohol or caffeine, as these make the condition worse.
• Do not use direct heat, such as hot water or a heating lamp, on the arms and legs.
• Wait for professional medical help to arrive before trying to do more.

Preventive Measures Against Hypothermia

Preventing the cold from taking over is much easier than treating it after it starts. You should always be prepared for the weather to change.

• Wear several layers of loose clothing to trap warm air near your body.
• Choose wool or synthetic fabrics instead of cotton because they stay warm when wet.
• Always wear a hat that covers your ears and warm gloves.
• Stay as dry as possible and change out of wet clothes immediately.
• Eat enough food to give your body the fuel it needs to create heat.
• Drink plenty of water because dehydration makes you more susceptible to the cold.
• Keep a survival kit in your car with blankets and extra warm clothes.
• Pay attention to the signs and symptoms of hypothermia in yourself and others.

Wrapping Up

The cold is a powerful force that can affect your health in many ways, but staying informed and prepared can help you enjoy the winter months safely. Always look out for your friends and family when temperatures drop. If you notice someone shivering heavily or acting confused, take action immediately by providing warmth and seeking medical help, as quick care is key to a full recovery.

It is also wise to plan for medical costs, as emergencies can be stressful and expensive. Niva Bupa health insurance offers coverage to help manage such unexpected situations. Having the right insurance ensures timely access to care, so you can stay protected and keep your health a top priority this season.

FAQs

Why do some people remove clothes when freezing?

This is called paradoxical undressing. In severe cold, the brain becomes confused and creates a false feeling of intense heat, causing the person to remove clothing.

Can hypothermia also happen in summer?

Yes. Cold water in lakes or oceans can quickly lower body temperature, even on hot days.

Should frozen-looking skin be rubbed?

No. Rubbing can seriously damage tissue and push cold blood to the heart too fast. Handle the person gently.

Is shivering always the first sign?

Not always. Babies and some people with medical conditions may not shiver, so do not rely on this sign alone.