Muscular pain in the chest area can be caused by inflammation of the heart muscle or myocarditis, pleuritis, rib problems and muscle strain, states WebMD. Chest pain can be caused by a variety of organs other than the heart including the stomach and lungs.
When the heart muscle or myocardium becomes inflamed, the individual experiences muscular chest pain and a rapid heartbeat, fatigue and trouble breathing, explains WebMD. This disease, called myocarditis, can be caused by bacterial, fungal and viral infections that need to be treated directly or through calcium channel blockers and ACE inhibitors. Pericarditis occurs when the pericardium around the heart also becomes inflamed, manifesting as pain in the neck and shoulder muscles.
If the lining of the chest and lungs becomes inflamed, pleuritis or pleurisy results, according to WebMD. This causes stabbing chest pain during coughing or sneezing, and can be caused by infections or muscle strains. Nonsteroidal anti-inflammatory medications can help to relieve the swelling or inflammation, but effective treatments need to address the underlying cause. Broken or fractured ribs and the muscles between the ribs that become inflamed can all cause muscular chest pain. These problems eventually resolve on their own as long as the individual rests the area sufficiently.