Muscle cramps are felt to be caused by excessively excited nerves that stimulate the muscles. This can occur after injury to the nerve and/or muscle; dehydration; with low blood levels of calcium, magnesium, or potassium; from certain medications; and even at rest.

What causes your muscles to lock up?

Spasticity is generally caused by damage or disruption to the area of the brain and spinal cord that are responsible for controlling muscle and stretch reflexes. These disruptions can be due to an imbalance in the inhibitory and excitatory signals sent to the muscles, causing them to lock in place.

What is good for muscle bound?

Eat to Beat Them

One way to stop cramps is to stretch or massage your muscles and to eat enough of these key nutrients: potassium, sodium, calcium, and magnesium. They're called electrolytes, and you can find them in the following foods.