A granular sensation in the palate of the mouth may be caused by physiologic factors, palate swelling, and sensory abnormalities. 1. Physiological factors: Generally speaking, a granular sensation in the front part of the upper jaw of the mouth is normal. Usually, the front part of the palate refers to the folds on the palatal mucosa behind the upper front teeth, called palatal folds, which is the normal physiological structure of the human oral cavity. When the patient licks with the tongue, these mucosal folds will show granularity, which is a normal physiological phenomenon. 2. Palatal swelling: Usually there is a granularity behind the palatal folds, which may be a palatal swelling. Normally, under normal circumstances, the posterior aspect of the palatal crease is smooth and not granular. 3. Sensory abnormalities: Sensory abnormalities are usually associated with micronutrient deficiencies, high stress, irregular life or radiation therapy to the tissues around the mouth. Patients who experience a granular sensation in the palate of the mouth are advised to seek prompt medical attention and under the guidance of a specialized doctor for examination and treatment.