According to the data you provided (muscle cramps in legs and arms recently, intensive sweating), you might be experiencing muscle cramps due to changes in calcium or magnesium blood levels. Low levels of calcium are a well known cause of cramps which might turn even to tetany of muscles. Simply supplementing calcium and magnesium for a longer period (one to two weeks) and taking more water might significantly reduce the cramps if the condition is not severe.


Muscle spasms can be seen in multiple sclerosis, although multiple sclerosis is associated with far more symptoms. However, since you already have a family history of multiple sclerosis you might want to visit a neurologist to check for initial stages of multiple sclerosis.