Ulcers on the back of the tongue and throat can occur due to mouth infections, acidity, stress, vitamin deficiencies, irritation from spicy foods, poor oral hygiene, smoking, or viral illnesses. Since you are getting only slight relief with Hexigel Mouth Gel, you may need further evaluation to find the exact cause. Along with continuing good oral hygiene, rinsing the mouth with warm salt water several times a day may help reduce irritation and support healing. Avoid spicy, very hot, acidic, or hard foods because they can worsen pain and delay recovery. Drinking enough water and eating a balanced diet rich in vitamin B12, iron, and folic acid may also help if nutritional deficiency is contributing to the ulcers. Doctors sometimes prescribe vitamin supplements, medicated mouthwashes, pain-relieving gels, or medicines to reduce acidity, depending on the cause. If the ulcers last longer than 2 weeks, keep returning frequently, cause severe pain, difficulty swallowing, fever, weight loss, or swelling in the neck, you should consult a dentist or ENT specialist for a proper examination and treatment. Early evaluation is important because persistent throat or tongue ulcers may occasionally need further testing to rule out infection or other underlying conditions.