Mouth ulcers how to prevent and treat them ?

Aphthous ulcer: Aphthous (canker) ulcers may be caused by eating citrus fruits (e.g., oranges and lemons), physical trauma, stress, lack of sleep, food allergies, immune system reactions, and vitamin deficiencies b12/folate, and iron. Treat with salt water rinse or over-the-counter mouthwashes, and non-prescription local anesthetics. Prescription oral-liquid steroids may help. These ulcers are very common.

Annoying ulcers: Aphthous ulcers (mouth ulcers or canker sores) are incredibly common. We don't have a great idea what causes them but there are certain triggers like citrus, stress, alcohol - if you find your trigger, that's great! avoid it! doctors can give an antibiotic mouthwash like tetracycline which has shown some benefit in reducing symptoms. Lidocaine paste for the mouth can also help.