There are more reasons for tongue root ulcers, such as traumatic ulcers, recurrent aphthous ulcers and tongue cancer, etc. The details are analyzed as follows: 1. Traumatic ulcer: if you eat sharp food or hurt the root of tongue by your own teeth, it can cause damage to the mucous membrane of the root of tongue and form traumatic ulcer. 2. Recurrent Aphthous ulcers: If the mouth ulcers are recurring, but the site is different every time, this situation is mostly considered to be caused by recurrent Aphthous ulcers. This kind of aphthous ulcer will recur again and again and is self-limiting. 3. Tongue cancer: it is a kind of tumor that develops in the oral cavity, which mainly manifests as tongue pain, tongue erosion as well as ulcers and lumps. To sum up, there are many causes of tongue ulcers, which need to be clarified after timely consultation and then targeted treatment.