Management

MS and Summer: Coping with Symptom Flare-ups

Some may like it hot. But for those with multiple sclerosis (MS), life gets more difficult when the temperature rises. Up to 4 in 5 people with MS are sensitive to heat. They may have symptoms that get temporarily worse during hot weather or with any increase in body temperature.

As summer blazes, you might notice that you get tired more easily, have blurred vision, muscle weakness, or feel shaky. It's likely worse when it's humid or when you try to exercise. Symptoms can get worse from even a slight increase in your core body temperature. Heat-related changes are generally temporary and decrease as you cool down.

Doctors aren't sure why this happens. The temperature seems to affect how your nerves send messages to and from your brain. And some studies have found people with MS don't sweat as much, so their bodies can't cool down.

Beat the heat this summer with these tips:

  • Exercise indoors or in another cool area. Schedule outdoor activities in the early morning or late evening.
  • Try pre- and post-cooling to decrease the effects of exercise.
  • Don't use hot tubs and saunas.
  • Take a cool bath or a dip in the pool.
  • Wear lightweight, loose-fitting, light-colored clothes. Or look for specially made cooling garments. Some cycle cool air over your skin. Others place ice packs near your body. You could also place ice packs wrapped in a thin, clean towel directly to your armpits, neck, groin, and back.
  • Drink plenty of fluids. Stick to water and don't have drinks with caffeine or alcohol, which dry you out.
  • Family and friends may not know how temperature may affect your MS symptoms. Since symptom changes can greatly impact your quality of life, educate the people close to you so they can help you plan and enjoy summer activities.

Author: Ignite Staff

© 2000-2026 The StayWell Company, LLC. All rights reserved. This information is not intended as a substitute for professional medical care. Always follow your healthcare professional's instructions.

Start your journey toward better health

Select a primary care physician who will deliver personal care, close to home.

Find a Doctor

We have more than 4,500 specialty care physicians in our network

We have you covered from head (neurosurgery) to toe (podiatry.) And everything in-between!

Find a Doctor

Need Help?

Get the right care at the right time.

Learn More
Related Articles
Read article
Brain Health
Loss of Trunk Control: Safety Tips

When you have a loss of trunk control, you can't control your upper body. This puts you at risk for falls and injuries. Read on for safety tips to help you keep your balance.

Read article
Brain Health
Improving Sleep After Traumatic Brain Injury

A traumatic brain injury (TBI) is a sudden jolt to your head that changes how your brain works. It can cause trouble sleeping.

Read article
Brain Health
Parkinson Disease: Home Safety

Home safety in an important concern when you have Parkinson disease. This sheet can help you set up your home to be safe.

Read article
Brain Health
Parkinson Disease: Coping Tips for Caregivers

Caring for someone with Parkinson Disease is tiring and can be frustrating. It's important to take care of yourself too.