I'm with Lisa P ..... my dad used a Bible to smash his and it never came back. My DH went to the doctor and, lo and behold, he recommended the Bible thing. He said when you burst them, the body absorbs them and they don't come back. No use in draining them, they fill back up quickly. They could do surgery, but it was costly and painful. Later that night, I heard a loud thud - and then another. I walked into the living room and he had actually done it. It hurt, but he took some Advil. The next day he was fine and they've never come back.....that has been 15 years ago. Our DD 5 YO got one on her left wrist (she's left handed). She worried with it constantly and it was irritating to her. She'd scratch it and try to mash it. Papa talked her into letting him 'put the Bible on it.' She agreed. He sat her down at the kitchen table with the Bible, had Lilli-Kate stretch both arms out - hands facing up. He told her to close her eyes and count to 10. On 4, he he whacked it. It startled her so, that she stopped counting and opened her eyes ..... she got tears in her eyes and Papa hugged her and said what a big girl she was and gave her some ice cream. That was it. The wrist looked a little tiny bit bruised for a couple of days, but she ever missed school and didn't have a problem writing or anything. That's been 9 years ago - it has never come back. Made a believer out of me .... and her!
Good luck.