Muscle spasms are also referred to as muscle cramps and cause pain, hardness and tightening of the muscles, according to WebMD. Muscle spasms commonly occur in calf muscles, the thighs, the arms and in the abdomen.
Muscle spasms are a common condition that can be caused by a variety of factors that include overuse and trauma, according to MedlinePlus. Exercising when dehydrated may also trigger spasms. It is important for individuals who experience muscle spasms to immediately cease activity and massage the affected area. Pain caused by muscle spasms can also be soothed by taking anti-inflammatory medications and replenishing body fluids with sports drinks.