I do not -- but you do, so you are probably sensitive to sweet potatos/yams. Don't eat them for at least two weeks, then test them alone -- a good amount -- for lunch and note the results. If you feel fine, try them that evening at dinner with meat and see how you react. Note any reactions for the next 48 hours. You may simply have the bad luck to have a sensitivity to sweet potatos. If so, it is probably not the only food you will have a problem with. Keep experimenting and you will discover what works for you and what doesn't.