Long ulcers on both sides of the tongue are not certain to be tongue cancer, but may be traumatic ulcers, ulcers caused by nutritional deficiency, viral ulcers, etc. It is recommended to go to the hospital for examination and targeted treatment. 1. Traumatic ulcers may appear if the tongue is often bitten and irritated, the edges of teeth are sharp or contacted with too hot food. 2. Frequent picky eating leads to vitamin deficiencies or stress-induced ulcers. Generally, this kind of situation mostly appears in the young people who have a history of ulcers before. 3. Low resistance or viral infections may cause ulcers, herpetic glossitis may occur, it is recommended to improve the immune system. Therefore, long ulcers on both sides of tongue are not necessarily tongue cancer. If you usually smoke and chew betel nut, or if you are old and have underlying diseases, it is recommended to seek medical treatment as soon as possible to do pathological test, to clarify the cause of the disease, and to treat the symptoms. So as not to delay the condition.