Try eating bananas and drink tonic water (quinine water)
I am on my feet 8 to nine hours a day. walking and climbing up ladders. I have recently started taking b-12 ,vit d and also magnesium infew days the past
That is cramping. Do you exercise? Do you stretch? Are you deficient in magnesium? Are you under a lot of stress? You know, sometimes it's nothing, it's just life and things happen.