The extreme heat blanketing so much of the country isn’t just making headlines—it’s setting records. While soaring temperatures are uncomfortable for everyone, they can be especially dangerous for people with spinal cord injuries. That’s because paralysis can disrupt the nerve signals that normally tell your brain when your body is too hot or too cold. Without those warnings, it’s easy to miss the early signs of overheating—and heat-related illnesses can set in fast. Knowing why your body struggles to handle the heat—and what steps you can take to stay safe—can make all the difference when the weather turns hot.
Here are some heat tips from the Centers for Disease Control (CDC):
- Clothing: Choose lightweight, light-colored, loose-fitting clothes.
- Indoor cooling matters: Stay in air-conditioning as much as possible. When it’s over 90 degrees, fans alone won’t keep you cool indoors. If you don’t have air conditioning, take a cool shower to lower your body temperature.
- Limit outdoor activities: Try to go outside during cooler hours—early morning or late evening. Rest often to give your body time to recover.
- Limit exercise in the heat: If exertion makes your heart pound and leaves you gasping for breath, stop all activity. Get into a cool area or shade and rest, especially if you feel lightheaded, confused, weak, or faint.
- Use sunscreen: A sunburn does more than turn your skin red—it lowers your body’s ability to cool down, especially if you have a spinal cord injury. A wide-brim hat and sunglasses are also helpful.
- Avoid heavy or spicy meals: Eating cold meals with mild ingredients helps keep your body temperature steady.
- Stay hydrated: Drink water throughout the day before you feel thirsty. Avoid alcohol or very sugary drinks in the sun; they cause dehydration and loss of fluids. Replace fluids with a sports drink or water infused with electrolytes.
Body Temperature Regulation After SCI: Key Points
While it’s normal for your body temperature to fluctuate a bit during the day, a spinal cord injury (SCI) can keep areas below your injury level from cooling off or warming up the way they used to.
Signals between your brain and body can get blocked at the injury site. That means you might lose sensation below your injury level, making it harder for your brain to recognize when you’re getting too hot or too cold. This process—your body’s ability to keep its temperature steady—is called thermoregulation.
A part of your brain called the hypothalamus plays a major role in thermoregulation. It processes hot and cold signals and adjusts your body through the sympathetic nervous system, which triggers sweating, changes blood flow, and helps you react to temperature shifts.
How Does SCI Affect Body Temperature Regulation?
Ordinarily, your body has clear signals to handle temperature changes. You sweat to cool down. You get goosebumps and shiver to warm up. But after a spinal cord injury, areas below your injury may lose those automatic responses.
Messages to and from the brain often can’t get past the injury site, so the brain doesn’t receive the usual input from those areas and can’t send out the commands that keep your body temperature safe.
When these signals are interrupted, your body may not respond effectively, leaving you more prone to overheating (hyperthermia) or getting too cold (hypothermia).
Factors That Affect Body Temperature After SCI
These elements influence how well your body manages heat and cold after SCI:
Level of Injury:
The higher your injury, the more likely you are to have trouble regulating temperature. People with injuries at T6 or above are especially vulnerable to sudden spikes in blood pressure and body temperature (autonomic dysreflexia).
Severity of Injury:
Complete SCIs often cause a total loss of sensation and movement below the injury, which makes thermoregulation harder. Incomplete injuries may leave some pathways intact.
Blood Flow:
Your blood vessels normally widen to release heat or tighten to conserve it. After SCI, these processes can be disrupted.
Environment:
Extreme heat or cold can quickly overwhelm your body’s ability to cope. Planning ahead when temperatures swing is essential.
Emotional State:
Stress or panic can trigger a temporary rise in body temperature, sometimes called psychogenic fever.
Exercise:
Strenuous activity can lead to overheating, especially if you can’t sweat effectively. Talk with your healthcare provider about safe ways to stay active.
Muscle Mass:
Less muscle activity and smaller muscles mean your body generates less heat overall.
What to Do When Body Temperature Is High
If you start feeling flushed, dizzy, or weak, take action right away:
- Drink cool water.
- Wear light, breathable clothing.
- Move to an air-conditioned or shaded space.
- Use a portable misting fan to cool your skin.
- Try a cooling vest designed to help maintain a safe core temperature.
- Sit in front of a fan or use a damp cloth on your skin.
- Note: Be cautious with ice packs. Without sensation, it’s easy to develop ice burns.
What to Do When Body Temperature Is Low
Signs of hypothermia include shivering, pale skin, slurred speech, and slow breathing. If your temperature drops:
- Put on extra layers or blankets.
- Drink warm fluids (but avoid alcohol).
- Take a warm (not hot) bath.
- Use an electric blanket for short periods—monitor carefully to avoid burns.
- Do passive or assisted range-of-motion exercises to improve circulation.
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