Please choose the correct ending to complete the given sentence: Health: [header] How to stop a mouth ulcer from hurting [title] Decide how long you can wait for pain relief. [step] Some natural remedies are quick and easy to make using ingredients you probably have in your pantry. Others, while easy, may either require ingredients only available at specialty food stores or may take time to prepare.

Ending1: [substeps] If you've tried the following over-the-counter remedy without success, but you still feel pain or discomfort, consider switching to a different type of mouth ulcer remedy. Ask your doctor or pharmacist about using an over-the-counter mouth ulcer remedy. Ending2: [substeps] While they're supposed to help with pain, some physicians warn against treating a mouth ulcer immediately. Children over age 12 should not experience a mouth ulcer late in the day or long into the night, as food can clog blood vessels and lead to mouth ulcers. Ending3: Use what you feel comfortable with and try some of your favorite options. [substeps] Ibuprofen, naproxen sodium, and pineapple juice are all natural remedies for ulcers. Ending4: [substeps] Try various home remedies until you find the ones that work for you. Be aware of any food allergies or other sensitivities you may have before trying any home remedies.

Answer format: ending1/ending2/ending3/ending4