I have been suffering from a reoccurring lower calf pain for the last three years. The Pain mainly occurs in the upper centre of the left calf but it has happened to the right calf too. I have repeatedly rested until I no longer feel any pain and then I slowly build up my training but the injury reoccurs within a month or two whilst in the middle of a run. The pain is instant and sharp and tends to die down once I have stopped running but I can feel a dull ache for a few days afterwards. I have also seen a couple of physio's and they tend to give me strengthening exercises and deep massages which clears the problem and then they do not know where to go when the problem comes back. Has anyone have any experiences of this or any advice?