The text comes through: “Cookout at my cousin’s house Saturday. You coming?”
For most people, it’s a simple invitation. For someone living with multiple sclerosis (MS), it can trigger a bunch of thoughts and hesitations.
How hot will it be? Is there shade? How far is the walk from parking? Where can I cool off if my symptoms start acting up?
While everyone else is planning which dish to bring, you’re planning how to get through the day.
For many people with MS, heat isn’t just uncomfortable. It can temporarily worsen symptoms, drain energy, and turn activities that once felt easy into major challenges.
But you don’t have to spend the entire summer indoors. By understanding how heat affects your body and making a few smart adjustments, you can stay comfortable and enjoy the season on your own terms.
✓ Carry cold water everywhere
✓ Plan outdoor activities early or late
✓ Use cooling towels, neck wraps, or portable fans
✓ Wear lightweight clothing
✓ Know where air conditioning is available
✓ Rest before symptoms appear
✓ Leave events early if needed
✓ Pace yourself without guilt
If you’ve ever noticed your symptoms seem worse on a hot day, you’re not imagining it.
According to the National Multiple Sclerosis Society, heat sensitivity affects many people living with MS. Doctors use the term Uhthoff’s phenomenon to describe the temporary worsening of MS symptoms caused by an increase in body temperature, according to the National Library of Medicine.
That increase can come from:
The important thing to understand is that heat doesn’t cause new damage to the nervous system. Instead, it temporarily makes existing symptoms more noticeable. In most cases, symptoms improve once the body cools down.
MS damages the protective covering around nerve fibers, making communication between the brain and body less efficient.
According to the Cleveland Clinic, even small increases in body temperature can further slow nerve signaling in people with MS, making symptoms feel more intense.
That means a day that feels merely uncomfortable to someone else can feel overwhelming to someone living with MS.
Heat-related symptom flare-ups may include:
Many people describe it as their body’s battery suddenly dropping from 60 percent to five percent.
You may start the day feeling perfectly fine and then find yourself completely exhausted by lunchtime.
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Fatigue is one of the most common symptoms of MS year-round, but summer can make it even harder to manage.
According to Mayo Clinic, fatigue is among the most frequent and disabling symptoms experienced by people living with MS.
The challenge is that MS fatigue isn’t the same as simply feeling tired.
It’s not something you can always fix with a nap, another cup of coffee, or a little extra motivation.
When heat enters the equation, fatigue can become even more intense, making everyday activities feel much more demanding than they normally would.
That’s why managing your energy is one of the most important summer survival skills you can develop.
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Many people with MS spend a lot of time trying not to disappoint others.
You don’t want to cancel plans or seem unreliable, and you don’t want to explain your symptoms for the hundredth time.
But constantly pushing through can come at a cost. So your goal should be to add some balance and compromise to your routines.
That may mean:
One thing seasoned MS warriors learn quickly is that staying cool is part of symptom management.
Helpful cooling tools include:
While water won’t eliminate heat sensitivity, staying hydrated helps your body regulate temperature more effectively and may help prevent additional stress from dehydration.
The key is not waiting until you’re already overheated. Be proactive about your cooling strategies.
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Summer memories are often made outdoors, but that doesn’t mean you have to suffer through every event.
Before heading to a gathering, ask a few questions:
And here’s something worth remembering: You have permission to leave early. Seriously.
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Vacations can be wonderful, but they can also be exhausting. Between airports, road trips, crowded attractions, and hot temperatures, travel often requires extra planning when you have MS.
A few ways to make summer travel easier include:
Sometimes the hardest part isn’t the heat, it’s explaining how the heat affects you.
Friends and family may not understand why a summer outing leaves you exhausted or why you need to leave early. But heat sensitivity is a recognized MS symptom, not a lack of effort or motivation.
You don’t owe anyone a detailed medical explanation. You can simply say, “Heat tends to trigger my symptoms, so I have to pace myself.”
Heat-related symptom flare-ups are common, but that doesn’t mean you should ignore significant changes.
The National Multiple Sclerosis Society notes that heat-related symptom worsening is typically temporary and improves once body temperature returns to normal.
If symptoms become more severe than usual, last longer than expected, or feel different from your typical experience, it’s a good idea to contact your healthcare provider.
New or persistent symptoms should always be discussed with your medical team.
Living with MS may mean approaching summer differently, but different doesn’t mean disconnected.
Whether that means choosing the shaded seat, taking more breaks, or leaving an event a little early, those adjustments help you protect your health while still enjoying the season.
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