Adrenaline increases the "alertness" of the nervous system, meaning it's ready to trigger muscle contraction. It also increases the amount of blood flow and changes the tension of the muscles, which, ...

Infectious agents can cause muscle twitching and spasms, too. The most commonly known is probably tetanus, which causes a phenomenon called lockjaw, where the neck and jaw muscles contract to the ...

Muscle twitching is often caused by stress or a lack of sleep and is usually not serious. If muscle twitching occurs with muscle weakness or wasting, you should see a doctor. Muscle twitches can be ...

Though many people experience muscle twitching, it's often incorrectly identified as a muscle spasm. While both are involuntary contractions of a muscle, muscle spasms and muscle twitching aren't ...

If you often suffer from muscle cramps in your legs or any other part of the body during the night or daytime, then one of the possible causes of the problem is a nutrient deficiency. There are ...

It’s the most common sleep disorder you’ve probably never heard of: restless legs syndrome. RLS affects up to 10% of the population and can cause nagging pain and discomfort along with an ...