MS Relapse or Flare-Up? How to Tell the Difference
Updated: Sep 5
New or worsening MS symptoms can be frightening. Learn what usually defines a relapse, what can temporarily worsen old symptoms, and when to contact your MS team.
Understanding relapse
Relapses involve new symptoms or a significant worsening of existing symptoms. Day-to-day fluctuation is common in MS, so timing, duration and possible triggers matter.
A true relapse is usually considered when symptoms last at least 24 hours, occur after a period of stability and cannot be better explained by infection, heat or another trigger. Sudden major changes in vision or mobility deserve prompt clinical advice.
What can physiotherapy and rehabilitation help with?
Physiotherapy for multiple sclerosis is not about promising to reverse MS. It is about identifying the physical problems that are limiting you and using exercise, movement practice, pacing, equipment and rehabilitation strategies to improve or maintain function. The right programme depends on your symptoms and current mobility, so an exercise that is ideal for one person with MS may be completely inappropriate for another.
How to approach activity safely
If you develop new neurological symptoms, a major unexplained deterioration, sudden visual change or a significant change in mobility, contact your MS team or an appropriate healthcare professional rather than assuming exercise is the answer.
A complete MS rehabilitation programme
The Complete Multiple Sclerosis Physiotherapy & Rehabilitation Guide brings the exercise and self-management material together into one structured resource, with options across different mobility levels. It is designed to make it easier to choose appropriate exercises and build a programme rather than piecing together disconnected advice from individual webpages.
When ms relapse or flare-up is the concern, the first question is whether symptoms are genuinely new or clearly worse, and whether another factor such as infection, heat or severe fatigue could be contributing. New or significant neurological change should be discussed with the MS team. Rehabilitation is most useful once it is medically appropriate to start rebuilding activity rather than simply pushing through symptoms.
A sensible return to activity usually starts below the person's previous level. Choose a small number of functional markers such as walking distance, repeated sit-to-stands, stair tolerance or the amount of help needed for transfers. Increase one variable at a time — repetitions, resistance, distance or duration — so it is easier to judge whether the programme is helping or creating too much fatigue.
Recovery is rarely linear. A better day does not always mean the body is ready for a major jump in training, and a difficult day does not mean rehabilitation has failed. Using seated or supported alternatives, shorter bouts and longer rests can preserve consistency while symptoms settle.
The practical aim with ms relapse or flare-up is not to chase a perfect symptom-free day. It is to make activity safer, more repeatable and more useful in real life. Progress can be measured through things such as confidence, walking or transfer ability, exercise tolerance, recovery time and how much support is needed. A written plan also makes it easier to scale activity up or down when MS symptoms fluctuate.
With ms relapse or flare-up, the useful starting point is not simply doing more exercise. The aim is to identify which part of the task is limiting you — for example strength, balance, coordination, endurance, stiffness, pain, confidence or fatigue — and then choose an activity that targets that limitation without creating an unnecessary symptom flare. A short, repeatable programme is usually more useful than an occasional very hard session.
Want a structured MS rehabilitation resource?
Prefer guided group exercise? Book the strength and balance exercise class.
If you need advice tailored to you, book a physiotherapy assessment.
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