Patients with diabetes are advised to eat less or no cake. Cake contains a lot of sugar and is a high glycemic index food, which can rapidly increase blood sugar. Patients with diabetes need to monitor and control the stability of their blood glucose over a long period of time. Therefore, it is best for patients with diabetes to eat less or not to recommend eating cakes, which are high in sugar content. Patients with diabetes first need to do a good job of health education, which is the basic management of diabetes, patients with diabetes need to fully understand diabetes and master self-management skills. Secondly, they need to receive medical nutritional therapy, including rational control of total calories, distribution of nutrients, allocation of meal times, etc., and try to choose foods with low glycemic index. Patients with diabetes should follow the doctor’s instructions and monitor their blood glucose.