I have a cut on my gums and every time i eat,rinse my mouth, and blow, it herts really bad! i don't know what caused it but it won't heal at all!

Canker sores: You need to see a dentist when this hurts so bad you can,t eat or drink, if you have a fever, occurrence is prolonged, and if you have spreading or large sores.Meanwhile avoid trigger foods such as acidic and citrus foods,spicy foods,brush with soft bristle toothbrush and floss regularly,and avoid chewing gum. Causes are multiple

Cut gum: oral cuts can be "buggers" to heal since you can't put a dressing on them. I would use a very mild mouth rinse - 1/2 teaspoon of table salt in 8 oz of warm water - rinse and spit out. Try to avoid chewing gum or chewing food on the side of the cut and rinse your mouth out after food. It will take time but will heal. If it doesn't - please see your family doctor or oral surgeon.

Dentist, now!: What you are calling a cut may be just that, but may also be any of multiple lesions or may be gum disease. See your Dentist ASAP for differential diagnosis and treatment. Depending on cause, referral to Periodontist or to Oral Surgeon may be in order. Until you see Dentist temporary relief from 1 200mg Advil (ibuprofen) 4x/day w food or liquids, rinse w salt water, dab Orabase-B onto area w Q-Tip.