Managing diabetes after tongue cancer surgery can be challenging because eating difficulties often make strict diet control harder. Glycinorm OD 30 appears to be helping to some extent, and sugar levels between 120 and 180 may be acceptable in some patients, depending on age, overall health, nutrition, weight, and risk of low sugar episodes. In people who have difficulty eating properly, avoiding malnutrition and maintaining strength is also very important, not just strict sugar control. Your doctor may decide treatment goals differently because very strict diabetes control may sometimes increase the risk of weakness or hypoglycemia if food intake is limited. Softer balanced foods, smaller, more frequent meals, enough protein, hydration, and avoiding long gaps without eating may help maintain both nutrition and sugar stability. A dietitian experienced in cancer recovery and diabetes may also help create a meal plan that is easier to swallow and digest. Regular monitoring of fasting sugar, post-meal sugar, weight, and HbA1c is important to understand whether the current treatment is suitable or needs adjustment. Talk to your doctor if sugar levels rise further or if you develop weight loss, severe weakness, repeated low sugar symptoms, or difficulty maintaining nutrition.