Calcium deficiency has long been linked to muscular cramps.
One of them is a special ' soothing ' pot of cream to rub on your tummy to ease the cramps.
The water is very cold for most of the ear and can cause cramps and lead to drowning if not careful.
Symptoms of insufficient salt range from muscular cramps to heat exhaustion.
Symptoms include headaches, dizziness, vomiting, muscle cramps and spasms, pale skin, weak pulse and high temperature.
