A stingray weighing nearly 800lb is thought to be the largest freshwater fish ever caught by rod and line. It was so big that several men on board a small fishing boat had to take it in turns to help on the rod.
The hamstrings, a group of three muscles located in the back of the thigh, can contribute to lower back pain. So keeping the hamstrings properly stretched and limber is a good formula for relief of lower back pain or sciatica pain, which tends to run down one side of a leg. A regular routine of hamstring stretching eases tightness that generates stress on the low back. The hamstrings run from the pelvis down to the knee.
If your pain is from a recently pulled hamstring I would recommend Biofreeze. To treat the semimembranosus muscle, rub Biofreeze from the top of the inside of the thigh to the inside of the knee and down to the inside of the lower leg. Cold Pack For Hamstring Muscles.