What can cause muscle spasm in in rib cage?

Muscle spasms in the rib cage can be caused by various factors, including overuse or strain from physical activities, poor posture, or injury to the muscles or ribs. Conditions such as dehydration, electrolyte imbalances, or stress can also contribute to spasms. Additionally, underlying issues like rib fractures or respiratory conditions may lead to muscle tension and spasms in the area.