Hi is it normal to have recurrent ulcers in the mouth approx every 2 to 3 weeks upper & bottom lip sometimes in same places dr said aphthous ulcer?

Yes: Although there is no cure for mouth ulcers and they often reoccur, you may be able to reduce their frequency with good dental hygiene and by: avoiding foods that irritate your mouth, including acidic or spicy foods, Avoiding irritation from gum chewing, Brushing with a soft-bristled brush after meals and flossing daily, which will keep your mouth free of foods that might trigger a sore.

Recurrent ulcers: Recurrent ulcers that often is not normal. There is no common cause for aphthous ulcers. Aphthous ulcers can be caused by acidic foods, allergies, trauma/irritation, viral infection, and very often reaction to stress. Check with your dentist for any dental problems. Examine your diet choices. Check and see if the appearance of the ulcers coincides with any common events.

Does Occur: I have patients who have this in response to certain foods and stress. One patient has 4-6 all the time but refuses to limit beer and chocolate -- go figure. Record your food and drink intake for 1-2 weeks and the appearance of these along with it. Then systematically subtract one of them at a time until you find the culprit. Same with stress. If in more of a hurry,see the Oral Medicine specialist

Not uncommon: Canker sores is the most common recurrent 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.