the very short answer to your pain problem is that you very likely have a referred ( neuralgic ) problem, stemming from hypomobility and irritation at the joint/nerve in your lower lumbar spine . In particular at L5S1. It is from this level that so called hamstring tenderness and calf, heel, achilles pain etc problems usually arise. No amount of rubbing ,lasering , frictions , massage , needles or other treatments applied local to your pain will fix a referred event . It is in fact very easy and quick to fix permanently. Physiotherapists routinely mobilise Wikipedia reference-linkfacet joints till protective tonicity at the L5S1 level is normalised ( about ten to twenty minutes ) . this will immediately reduce and ultimately eliminate pain ( and abnormal muscle behaviour , sensation etc )referred from this common source.