30 red dates, a small amount of arsenic.

bubble_chart Preparation and Dosage

Take red dates, remove the pits, wrap them with a small amount of arsenic, burn until charred, let cool, and grind into a fine powder. Apply a small amount directly to the canker sores on the gums.

bubble_chart Indications

For children with acute gangrenous stomatitis, when all medications are ineffective.