Hi, Here are some potential causes that could be responsible for your symptoms: * Rib injury: The most common cause of rib pain is an injury, such as a fall or direct blow to the chest. A rib injury can cause sharp pain that radiates from the injured area to the chest. * Muscle strain: Straining or pulling a muscle in your chest or rib cage can cause pain that radiates from the affected area. * Costochondritis: Costochondritis is when a problem of inflammation occurs at the cartilage that is connecting the ribs and the breastbone. This condition can cause pain and tenderness in the chest, which can radiate to the rib cage. * Pleurisy: Pleurisy is an inflammation of the lining around the lungs and can cause sharp pain that radiates to the chest and rib cage. It can be caused by a viral infection, pneumonia, or other underlying medical conditions. * Heart attack: A heart attack can cause pain in the chest that can radiate to the arms, back, and jaw. Although rare, it s essential to seek medical attention immediately if you experience chest pain or discomfort, especially if it is accompanied by other symptoms such as shortness of breath, nausea, or sweating. In conclusion, radiating pain from your left side rib to your chest could be caused by various underlying conditions. Take care. Hope I have answered your question. Let me know if I can assist you further. Regards, Dr. Priyanka, General & Family Physician