The root ( the predominantly medicinal part of the species ) is still known for its astringent capabilities ( as well as a strong laxative ); the tannins in the root caused an astringent action making it useful in the early stages of diarrhea, dysentery, and other intestinal problems . " It also serves as an antibacterial in its ability to treat " toothaches, shingles, fevers, hypertension, burns, acute appendicitis, acute infectious hepatitis, conjunctivitis, swelling and pain of gums, and sores of the mouth or tongue ."