If you have strained, pulled or otherwise injured a muscle or are having muscle cramps, then you can try ferrum phos, kali sulph and mag phos. You could also just take muscular tissue salt combination I from Luyties. Recently a athletic but older gentleman had a continuous pain in his right hamstring and a combination of this cell salts tissue salts were given at maximum dosage and the pain was relieved and walking for a distance became possible again after a little over a day.