Three out of every four people with MS have spasticity. Spasms and spasticity cause the muscles to tighten, but then they do not relax. People can react in different ways to spasticity. For example, a leg can suddenly become stiff or refuse to bend, while at other times a leg will be completely limp. Spasticity may cause one person's arm to simply feel stiff and another person to have an elbow that is impossible to bend. Spasticity and spasms can also make it difficult to sleep at night.
For many people with spasticity, the extra work it takes to move around when the muscles are stiff can make them tired or fatigued. The increased stiffness in the muscles means that a lot of energy must be used for daily activities.

Reducing spasticity gives a person with MS greater freedom of movement and can increase strength and coordination. Occasionally however, spasms in the legs may give you a sense of security when you stand not because you have gained more strength but because the spasms are making your legs feel stiff when you stand. In this case spasms can actually be helpful.
If you are being treated for spasms and are no longer able to stand, transfer, or walk, you should discuss this with your medical team. If spasms and spasticity don't cause you pain or interfere with daily activites, you and your doctor may decide that it isn't necessary to treat them.
Like all treatments, managing spasms and spasticity should be discussed with your healthcare team. You should be involved in the decision-making process and should feel comfortable discussing any and all symptoms you may be experiencing. Ask about the possible side effects of spasm medications. Spasticity is not something that people with MS simply have to endure, but is rather something can be dealt with and resolved.