With the fewer details available, I would suggest you to consult with a physician as muscle cramps of whole body and that too developing in a short span of time, can be of systemic origin. It can happen due to a wide variety of issues from dehydration, electrolyte imbalance to metabolic and endocrinological diseases; and drug side-effects. Symptomatic management may be started and physician may refer you to appropriate speciality after clinical and lab tests.
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