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

Eating pineapple causing pain at the corners of the mouth can generally be treated locally, such as rinsing with normal saline, using medications for oral ulcers, and applying iodine glycerin to relieve symptoms.

1. Normal Saline Rinsing

Use normal saline solution and gauze. If you don't have these at home, you can make a mild saltwater solution by adding a small amount of table salt to a cup and mixing it with boiled water. Rinse your mouth with this solution, but try not to swallow it, as pineapple is acidic. Neutralizing with salt water can quickly alleviate pain at the corners of the mouth.

2. Medications for Oral Ulcers

You may use medications designed for oral ulcers, such as bFGF (basic fibroblast growth factor) gel (e.g., Befuxin gel), applied twice daily to the painful area at the corner of the mouth.

3. Iodine Glycerin

Apply iodine glycerin directly to the affected, painful areas. It's best to rinse with salt water before eating to prevent discomfort in the mouth and at the corners of the lips. Avoid eating pineapple recently to prevent irritating the wound. Maintain a light, easily digestible diet and avoid oily, spicy, or other irritating foods as much as possible.