The hamstring was broken and then attached. Why is it swollen for a long time? Does smoking have a compound injury?

Of course, such a deep surgical wound will swell, and it will disappear after a few days of intravenous drip. As for smoking, it will not affect wound healing. Don't listen to those doctors. Everything they say is terrible. Smoking affects the lungs and brain. Go and smoke. Eat something high in protein, such as lean meat, milk and crabs.