DEAR DR. ROACH: I am a 69-year-old, very active male. My left Achilles tendon severed two years ago, but it was surgically repaired. I had an 8-inch incision that has totally healed, with the exception of one small area about the size of the lead of a pencil. It’s 3 inches above my heel. This small area would close up for a few days, then reopen with small amounts of off-white fluid oozing from th…