I wish somebody had mentioned in the tooth abscess thread that grapefruit seed extract should not be used full strength in the mouth. It was one of the few items mentioned in the thread that I had in the house when at 3:00am this morning I read four pages of the thread and decided to try it as part of a poultice in a bit of gauze, which I left in my mouth until the pain from it seemed so much worse than the abscess I was trying to relieve that I got up and took it out (about three hours). I've been sick and have missed a lot of sleep over the last five months... At 3am I'm not too cogent. I didn't read the bottle. Now I've got second-degree burns in the entire left side of my mouth.. Gums and cheek. It's worse than the tooth abscess, will last longer (with tissue sloughing and probable infection), and is likely to leave significant scars. Now there's no chance that I can avoid the antibiotics. I really could have used just a tiny warning.