Every 4-5 weeks DH gets ill. It starts with indigestiony type pain and becomes more and more intense the pain moving all around from his front to back. He finds it impossible to find a comfortable position. Sometimes vomits, lasts for about 8 hours. He also itches a few days before. And says he feels indigestiony a few days prior? Could this be a gallstone blockage? If not any one any ideas?