The fatigue of MS is both physical and mental, and can be overwhelming in both regards. Fatigue can make it difficult to concentrate. It slows the thinking process and makes one forgetful. It can even affect motivation. The other chronic symptoms of MS are made worse by fatigue, and it can contribute to muscle pain and spasms.
Fatigue increases with physical exertion, emotional stress and exposure to heat.
Weakness Weakness is not the same as fatigue. Weakness is often just temporary, but can last for an extended period. Weakness can contribute to problems with walking. Vision problems and several other symptoms, whether alone or in combination, can be also make walking more difficult. Because many things can contribute to difficulty in walking, it is important to accurately identify the source of the difficulty.