Muscle Trouble, also known as muscle SPASM, is a condition in which the muscles involuntarily contract and cause pain. The medical term for this condition is SPASM, which is a five-letter word that can be found in many crossword puzzles. Muscle spasms can be caused by a variety of factors, including dehydration, electrolyte imbalance, overuse, or injury. Treatment for muscle spasms typically involves rest, stretching, and massage.