Life hack ? For five days exactly at 4 am I start feeling my legs pull…

Life hack ? For five days exactly at 4 am I start feeling my legs pulling, awful sensation, even teeth chattering ? And walked on cold floor and husband stretched and what I did not do, nothing helped until... until I took out a chilled milk package put it on the bed and then leg (yolk) on top and oh salvation ? pain went away with a hand? What a relief, now you can sleep ?