Go through these in order and stop at the first one that applies. If you are reading this for someone else, answer for them.
Seek emergency care for severe trouble breathing, chest pain, loss of consciousness, a suspected serious injury, or sudden stroke-like symptoms such as facial drooping, arm weakness, or difficulty speaking.
Seek prompt medical advice for new or clearly worsening neurological symptoms, especially if they last more than 24 hours or occur with fever or infection.
These symptoms need assessment rather than simply increasing or stopping rehabilitation on your own.
Contact your rehabilitation or MS team during routine hours if exercises repeatedly cause pain, prolonged fatigue, falls, skin damage, or symptoms that do not settle after rest.
Also contact them if equipment no longer fits or your goals and abilities have changed.
Every sign above is quoted from the sofidex article on Rehabilitation for multiple sclerosis. If you are not sure, err upward — it is always reasonable to be checked.