I haven't taken bloodroot but I do have shoulder pain. To me, the shoulder pain can indicate liver issues. Usually, it's the right side that hurts due to liver issues.
Just some thoughts... I took some MMS & had a great deal of shoulder pain. At first, I thought it was killing stuff in my shoulders. Then I thought, it may actually be my liver.
I stopped taking the MMS but my shoulder still hurts... Seems to be a liver issue at this point. I could be totally wrong, though.