Tingling in the left chest may be a precursor to intercostal neuritis or cardiac system diseases. 1. Intercostal neuritis: Intercostal neuritis can be caused by infection, virus, mechanical injury and other factors. It is characterized by chest pain distributed along the edge of the ribs, mostly stabbing pain with paroxysmal aggravation, which is a group of symptoms due to different causes of injury. The main symptoms include chest pain and numbness and discomfort of chest wall nerves. 2. Cardiac system diseases: such as coronary heart disease, manifested as anterior chest wall pain and progressive aggravation, coronary heart disease often chest pain in patients because of the body’s blood vessel blockage, often due to fatigue, excitement, after a full meal and other triggers. It can be treated with aspirin, clopidogrel and other drugs as prescribed by the doctor. Patients feel numbness in the left chest need to go to the hospital as soon as possible, under the guidance of the doctor for standardized treatment. Patients usually need to pay more attention to rest, do not stay up late for a long time, to ensure adequate sleep.