At night a leg or foot the cramp sufficed

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The doctor, to me of 69 years. All the night long a leg or foot the cramp sufficed. It was excruciated till the morning. How with it or this to struggle?
(In sense lekartstva, (tablets, ointments), procedures...) That will advise?

[Grigoriev Alla]

It is difficult to tell or say - looking with what it is connected. First of all hand over a blood on electrolytes. Whether it is connected with the beginning of catarrhal disease? The temperature does not raise or increase? Whether there is no anemia? What preparations accept?