massage don't help shit. i heart both of my achilles the first time I trained with a new muay thai trainer, it bothered me for a good half decade until I started to rehab it at the same time as rehabbing a knee injury. I would put my hands against a wall and stretch the achilles, it would hurt like hell but this is the technique I would use. I would stretch it till it hurt, then come off it a little so it would be just at the pain threshold, it was stretching but the pain was only an annoyance. I would keep the same position until it didnt hurt anyore than go a little further until it hurt just a little again. I put in a good half hour every day of this, and sure enough I no longer have problems. I still stretch about once every two weeks, I would say it took me 6 months of stretching to completely stop having pain in the tendon. The injury was not a complete tear, but I couldn't walk for about a week... straight up could not take a step