What should I do if my mouth corners hurt after eating pineapple?

Mouth corner pain after eating pineapple can generally be managed with local treatment, such as rinsing the mouth with normal saline, applying oral ulcer medications, or using iodine glycerin to alleviate symptoms.

1. Normal saline mouth rinse: Use normal saline solution combined with gauze. If normal saline and gauze are unavailable at home, a mild saltwater solution may be prepared by dissolving a small amount of table salt in boiled water. Rinse the mouth thoroughly with this diluted saltwater—but avoid swallowing it, as pineapple is an acidic fruit. The alkaline properties of the saltwater help neutralize acidity and rapidly relieve mouth corner discomfort.

2. Oral ulcer medications: Apply topical oral ulcer treatments—such as Befuxin Gel—twice daily directly onto the affected area at the corners of the mouth.

3. Iodine glycerin: Apply iodine glycerin topically to the painful area. Prior to application, it is advisable to rinse the mouth with saltwater to minimize discomfort in the mouth and at the corners of the lips.
       Avoid consuming pineapple for the time being to prevent wound infection. Maintain a light, easily digestible diet and avoid greasy or spicy/irritating foods.