I am currently bowling with achilles tendonitis, and I am also a doctor. The problem with the achilles tendon is that it has a relatively poor blood supply and therefore healing takes a long time. Rest, ice, stretching, and anti-inflammatory drugs will obviously help (I only bowl about 6 games per week). My secret weapon is to use a night splint to gently stretch the calf muscles while sleeping (but not irritate the tendon). Check out the Pro-Tec Night Splint. I bought mine from Ithacasports.com because they are local. I'm sure you can find one close to where you live, and it should help substantially. Just remember it takes a long time to heal. Go slowly and don't push it.