What should you do and not do when you pull your hamstring?

Let it heal: The problem with many of these hamstring injuries is that people return to activity and sports before they are fully healed. A significant injury may take 4-6 weeks to heal the initial treatment is ice, rest and nsaids. You need to gradually return to sports as jogging will be much easier than sprinting.. In general, don't do anything that causes pain in the affected area. Many of these recur.