Muscle aches and pains can occur when your muscles are injured or overworked. The pain itself usually arises from a muscle spasm, which is a natural reaction that helps protect injured body parts by limiting their movement. Muscle pain can also involve ligaments, tendons, and fascia, the soft tissue that connects muscles, bones and organs. Sore muscles are common after working out, playing sports, or even doing housework. Muscle aches are also caused by too much tension or stress.
* See a doctor for pain lasting longer than a few days.