Left- side chest pain can have multiple causes, ranging from benign muscle strain or heartburn to severe issues like heart conditions. If you’re ever in doubt about the cause of the pain in the left side of your chest , seek emergency medical services immediately. Below are some common causes of left- sided chest ... Introduction Have you experienced chest pain before? Maybe as a result of acid reflux or heartburn, or even sometimes as a result of muscle soreness after a chest workout. While these are common types of chest pain we may experience in our day-to-day lives, sometimes, people may experience pain , particularly in the left side of their chest . Since this is where the pain due to a heart attack is radiated, it is important to take pain in the left side of the chest seriously. Worried about left side chest pain ? Discover its causes like heart, lung or muscle issues and warning signs. Know the treatment & remedies for quick relief.