MS Fatigue: Overcoming Tiredness & Exhaustion

What is MS fatigue?

MS fatigue is a common symptom of multiple sclerosis characterised by overwhelming physical and mental exhaustion that is not relieved by rest. It can occur without warning, is often disproportionate to activity levels, and can significantly impact daily life.

Until it is experienced, it can be hard to understand how challenging MS fatigue can be, but take hope – it helps to share stories and swap tips with other people within the MS community who have learnt how to manage or reduce their fatigue symptoms. There are many ways to help limit MS fatigue.

How long does fatigue last?

Fatigue levels can vary greatly from day to day and even during the course of a day, and will affect everyone differently. Some people will have definite triggers (e.g. poor sleep, stress, physical exertion) whilst for others there is no obvious pattern to their exhaustion.

It is not necessarily a permanent symptom, and there is much an individual can do to manage and improve their levels of tiredness.

What does MS fatigue feel like?

MS fatigue is often described as an overwhelming sense of physical and mental exhaustion that is far more intense than normal tiredness. It can come on suddenly, even after a good night’s sleep, and may worsen as the day goes on.

People with multiple sclerosis often say that MS fatigue feels:

• Disproportionate to activity levels (even small tasks feel exhausting)
• Unpredictable, appearing without warning
• Not relieved by rest or sleep
• Mentally draining, affecting concentration and memory
• Physically heavy, as if the body is weighed down

Some describe it as a “battery that drains very quickly and doesn’t fully recharge.”

Unlike everyday fatigue, MS fatigue can significantly interfere with daily activities, work, and quality of life.

Causes of MS fatigue

Fatigue is one of the most common and disabling symptoms of Multiple Sclerosis (MS), affecting around 80% of people with the condition. MS fatigue can be caused by a variety of factors, both directly related to the disease and as a result of its impact on the body:

1. Nerve Damage (Primary MS Fatigue) – MS-related damage to the central nervous system disrupts the normal flow of nerve signals, making the brain and body work harder to complete simple tasks. This extra effort can lead to a specific type of fatigue known as lassitude—a unique MS fatigue that isn’t always relieved by rest.
2. Heat Sensitivity – Many people with MS are sensitive to heat, whether from weather, exercise, or fever. Even a slight increase in body temperature can worsen MS symptoms and lead to sudden fatigue.
3. Sleep Disturbances – MS can cause pain, muscle spasms, or bladder issues at night, making it difficult to get restful sleep. Poor sleep quality over time contributes significantly to daytime fatigue.
4. Medication Side Effects – Some medications used to manage MS symptoms, such as anti-spasticity drugs or pain relievers, can cause drowsiness or increase fatigue as a side effect.
5. Depression and Mood Changes – Depression, which is more common in people with MS, can also lead to persistent feelings of tiredness, lack of energy, and mental fatigue.
6. Deconditioning – Reduced physical activity due to MS-related mobility challenges can weaken muscles over time, making physical tasks more tiring and contributing to general fatigue.

How to manage MS fatigue

Watch this video from Dr Gretchen Hawley on how to reduce fatigue and combat your tiredness levels.

Lifestyle strategies

Managing MS fatigue often starts with small, consistent lifestyle changes that support overall energy levels throughout the day.

Helpful strategies include:

• Prioritising sleep by keeping a regular sleep schedule and creating a restful environment
• Pacing activities, breaking tasks into smaller steps and allowing time to rest
• Reducing stress through mindfulness, meditation, or relaxation techniques
• Keeping cool, as heat can worsen fatigue symptoms
• Planning your day around your energy levels, tackling more demanding tasks when you feel most alert

Many people find that developing a daily routine helps conserve energy and reduces the unpredictability of fatigue.

Diet and nutrition

What you eat can play an important role in managing MS fatigue. A balanced, nutrient-rich diet helps support energy production and overall wellbeing.

Key dietary approaches include:

• Eating whole, unprocessed foods, including fruits, vegetables, whole grains, and legumes
• Including healthy fats, such as those found in nuts, seeds, and oily fish
• Staying hydrated, as even mild dehydration can increase fatigue
• Avoiding large, heavy meals that may lead to energy crashes
• Limiting processed foods and added sugars, which can contribute to fluctuations in energy

Some people with MS find that adopting a plant-based, whole-food diet supports more stable energy levels over time.

Exercise and energy management

Although it may seem counterintuitive, regular physical activity can help reduce MS fatigue and improve overall energy.

Effective approaches include:

• Low to moderate intensity exercise, such as walking, swimming, or yoga
• Building activity gradually, starting small and increasing over time
• Incorporating rest periods before fatigue becomes overwhelming
• Using energy conservation techniques, sometimes called “pacing” or “energy budgeting”
• Listening to your body, adjusting activity levels based on how you feel

Exercise can also improve sleep, mood, and strength, all of which play a role in managing fatigue.

When to seek medical help

While MS fatigue is common, it’s important to speak to a healthcare professional if fatigue is severe, worsening, or affecting your daily life.

You should consider seeking medical advice if:

• Fatigue is sudden or significantly worse than usual
• It is interfering with work, relationships, or daily activities
• You are experiencing new or unusual symptoms
• Fatigue may be linked to poor sleep, depression, or medication side effects
• Self-management strategies are not providing enough relief

A healthcare professional can help identify underlying causes, rule out other conditions (such as anaemia or thyroid issues), and discuss additional treatment options, including medication or tailored support.