My son is 11 years old and has mouth ulcers what can i use to get rid of them?

Hygiene,diet: Brush, floss since he has adult teeth now, use a mild antiseptic mouth rinses , also diet is an issue, avoid sharp , sticky and unhealthy foods like ships etc. , it should go away within a couple of days, if it persists over two weeks, see a dentist or a pediatrician ..

Dental evaluation: Your son should be checked by a dentist when he is having an ulcer. There are several causes; trauma , biting, allergies, stress, sensitivities to food, allergies, viral, immune disorders. So have a dentist find the cause. In the meantime try an otc medication for mouth sores or canker sores.

Lasers can help: First of all prevention would be the first step.Try to see if there is any things in his diet that act as triggers. Using Sodium Lauryl Sulfate (SLS) free toothpastes can help reduce attacks as well. Laser treatments can give immediate relief and speed healing. These treatments are comfortable and safe. For more information...http://www.laserdentistbaltimore.com/mouth-ulcer-and-cold-sore-laser-treatment/

Canker sores: is the most common oral lesions. Most ulcers, infections will clear up by themselves within a week or two. You should see your GP or dentist if the ulcer gets worse or lasts for longer than 2 weeks. Best of luck.