I get re occurring ulcers on my tongue i change my tooth brush regular and use mouthwash. what can be causing these ulcers?

Ulcers on tongue: Recurring apthous ulcers have no definitive cause. Possible causes are stress, injury/trauma, diet (acidic foods),smoking, acid reflux or other GI diseases, allergies, viral infections, vitamin deficiencies, hormone imbalance. Check with your dentist or medical doctor for an examination and diagnosis of posssible causes.

Canker sores: are the most common oral lesions. Individual ulcers typically last 1-2 weeks. The condition is idiopathic (cause is not known) recurrent aphthous ulcers is usually self-limiting. Try to keep adequate oral hygiene as possible. If concerned see your dentist after 10 days or visit today for laser immediate amelioration.