I am 20 years old this year, every time I ride a bicycle or run hard, I have pain like someone choking in the left chest area, then cold sweat breaks out all over my upper body. Sometimes a dull throbbing pain in the chest lasts up to 3 days even when the child is at rest. I went to the doctor many times but still no accurate results. The doctor asked me, what is the squeezing pain in the left chest with exertion? Looking forward to consulting your doctor. I thank you!