The tingling in the left chest may be a normal physiological reaction, or due to atherosclerosis or intercostal neuritis. 1. Physiological reaction: when the habits of life suddenly changed, such as suddenly quit smoking, quit drinking, you may feel uncomfortable, the chest has a tingly reaction. This is a normal physiological manifestation, and when the body returns to normal, the symptoms will gradually decrease. 2. Atherosclerosis: also known as coronary heart disease, when myocardial hypoxia occurs, or angina pectoris is induced, there may be a tingling reaction of the heart, related to the insufficient blood supply to the heart. 3. Intercostal neuritis: usually associated with trauma and infection and other factors, repeated exposure to disease-causing factors lead to intercostal nerve stimulation, there may be an abnormal reaction, including symptoms such as chest tingling. Chest tingling may also be a vegetative nerve disorder, and regular observation is recommended. If the symptoms persist for a longer period of time and become more and more serious, it is recommended to consult a doctor in a timely manner and analyze the symptoms through electrocardiography, cardiac ultrasound, and coronary arteriography.