There's an excellent website you should visit which tells you everything you need to know about giving yourself enemas. It's http://www.OptimalHealthNetwork.
Extremely informative. You can by 5 min videos showing how to properly give yourself a therapeutic enema. They also have special equipment which help you avoid cramps after enemas. I can tell you one thing...if you are experiencing cramps in the abdomen after enemas it is bcuz you're taking the enema too fast, and you're not massaging the abdomen during the intake of water. I've been taking enemas (coffee and other kinds of enemas w/ supplements) for about 2 years now. Go to Optimal Health Nework. It'll help you a lot. All the best!