It's not common, usual side effect is the detox headache, but sweating could happen too if your small intestine or large intestine is backed up just a tad with toxins. To know for sure, stop taking it but don't change anything else about your regimen and see if symptoms ease up. If symptoms don't ease up, do a detox bath and some extra colon cleansing/digestive enzymes and skip a few meals if you can.