I have that problem too. My problem seemed to be caused by several things - when the stones and sludge came out it was very irritating so the small intestine became congested and my body wanted to hurl it back up. For this I learned to sit up in bed and start massaging firmly but gently downward from the sternum. When the nausea passed I would lay down and continue massaging - sometimes I could feel more stones pop out of the bile duct. I also had a tangle of tapeworms, whipworms and flukes which came out during a Liver-Flush after I took 3 weeks or more of Quassia tea. I think that some of these worms were blocking the bile duct.