Tips for managing heat and fatigue with NMOSD

Living with neuromyelitis optica spectrum disorder (NMOSD) can come with unique challenges, especially when it comes to NMOSD fatigue and heat sensitivity. Many people find that warmer temperatures can make fatigue and other symptoms feel more intense or harder to manage.

This is thought to be due to Uhthoff’s phenomenon, in which an increase in core body temperature — from a hot bath, fever, or exercise — impairs the nerves’ ability to send signals across damaged areas, resulting in a temporary worsening or recurrence of neurological symptoms.

While you can’t always avoid heat sensitivity and fatigue, following certain NMOSD lifestyle tips can help you stay cool, conserve energy, and move through your day with more ease and consistency.

Quick ways to stay cool with NMOSD

Finding small ways to stay cool throughout the day may make it a little easier to manage fatigue with NMOSD. Consider:

• keeping a fan nearby in spaces where you get ready or sleep to help maintain a comfortable temperature
• using a cooling towel or neck wrap when running errands or spending time outside
• drinking cool fluids consistently to help regulate your body temperature
• taking lukewarm showers instead of hot ones, which may feel more refreshing without raising body heat
• staying in shaded or air-conditioned environments when possible

Even small ways to stay cool can make a difference if you experience NMOSD heat sensitivity, especially during warmer months or in spaces that tend to heat up indoors.

Reduce heat triggers

Identifying and adjusting common heat triggers may help support a more manageable daily routine for NMOSD.

• Plan chores or errands earlier in the morning or later in the evening when temperatures are lower.
• Wear lightweight, breathable layers that can be adjusted throughout the day.
• Avoid cooking with gas or open flames when possible, as they can increase indoor heat.
• Keep blinds or curtains closed during the hottest parts of the day to reduce indoor warmth.

These small shifts may help limit unnecessary heat exposure and make everyday tasks feel easier.

Stay hydrated

Staying hydrated plays an important role in staying cool with NMOSD and supporting your overall energy levels.

Drinking fluids regularly throughout the day, even before you feel thirsty, may help your body better regulate its temperature. Some people find it helpful to keep a water bottle nearby as a reminder to sip consistently.

Cool drinks, electrolyte beverages (if approved by your care team), or water-rich foods, such as fruits like watermelon, oranges, and strawberries, may also help support hydration. If you are unsure how much fluid is right for you, your healthcare provider can help guide you based on your individual needs.

Take regular rest periods

Fatigue can build over time, especially in the heat, so taking breaks throughout the day can help prevent you from overdoing it.

Spacing activities out and tuning in to how you’re feeling can help your energy feel steadier and more manageable. Similarly, taking short pauses between activities gives your body a chance to recover. This might look like sitting in a cool space, elevating your legs, or simply taking a moment to rest between tasks.

It can also help to let friends and family know when you need to pause. Sharing that rest is part of managing your condition may help them better understand and support you.

Maintain good sleep hygiene

Quality sleep can play an important role in managing NMOSD-related fatigue and supporting your overall well-being.

Helpful sleep habits may include:

• keeping a consistent sleep routine, such as going to bed and waking up at the same time each day
• creating a cool, dark, and quiet sleep environment to make it easier to rest comfortably
• limiting screen time before bed
• avoiding heavy meals late in the evening
• building a calming nighttime routine

If sleep continues to feel challenging, your care team can help you explore additional strategies tailored to your needs. Over time, these habits may help create a stronger foundation for managing fatigue and maintaining a balanced daily routine for NMOSD.