There are many possible reasons for your legs to become suddenly weak. If your legs are suddenly too weak to stand up, especially if you stood up without any difficulty before this occurred, we consider this a potential medical emergency. If this is the case contact your doctor immediately or go to the emergency room.
If you’ve experienced longstanding problems with leg weakness and standing as a result of your MS, this may be less of an emergency. It is best to contact your doctor immediately and get directions on the best course of action.
Revere (Rip) Kinkel MD
Director of the Multiple Sclerosis Program
Director of Hillcrest Neurology
Professor of Clinical Neurosciences
University of California San Diego