3. Hamstring Stretch on Wall
If the pain is behind the leg, then you can try this exercise. Lie down so that you are in a doorway. You want your upper body to be in one room and your lower body to be in another, so your waist should be level with the doorframe. Now lift one leg directly upwards and rest it flat against the wall. You can now move yourself towards that wall until you feel a slight stretch.
This exercise is a great one for stretching the hamstrings. Make sure to do the same thing on both sides – that goes for all these exercises.