Appearantly, when your liver releases its toxins during the cleanses, some of them end up in the blood until they are broken down and removed by the lymphatic system. This may take place in the colon. Subsequently, there results in temporary swelling of the lymph nodes (enhanced immune action) and flu-like symptoms. It is difficult to for me to find out the excact reasons why your body is doing is unless I have more information about you. You may want to consider a tele-consultation with me, my number is (864)848-6410.