No. There may be slight discomfort, but any pain experienced is generally the result of resistance and tension. A professional colon therapist is skilled at putting you at your ease and minimizing discomfort. Most people actually enjoy the colonic and are especially pleased with then accustomed sensation of feeling lighter, clean and clear afterward. Sometimes during a colonic, the colon muscles will contract suddenly expelling considerable amounts of liquid and waste into the rectum. This may feel like cramping or gas, and may create a feeling of urgency to empty the rectum. Such episodes, if they do occur, are brief and easily tolerated.