cleansing can constipate you, despite taking herbs with a laxative effect. The truth is, humaworm has so many herbs in its forumula, that the amount of herbal laxatives really can't be that great.
Try plain warm water enema's and/or fresh lemon juice in warm water. Doing this several days in a row seems to get things going for me. Walking is helpful also.
Constipation is a good sign that it is working. It does not make sense that killing parasites, which improves bowels in the long run, can causes this, but that is pretty normal. When I am cleansing, I feel the same way, no BM, and no feeling like I have to go.