It was either on my third or fourth day pulling that I started to get terrible headaches. They would come on towards the end of the day and last all night long. I bet I had them for about 4 days and then they went away. I found that if I pulled again when I got home from work it seemed to help the pain subside. It didn't go away but it helped. My headached was accompanied by a lot of stomach bloat which has also gone away.