Mooncakes are high-sugar, high-fat foods, and many are filled with lard, which should be eaten with caution by patients with some diseases. Diabetic patients can cause increased blood sugar, especially insulin-dependent diabetic patients should be careful eating. People suffering from cholecystitis, gallstones, over-eating mooncakes can cause contraction of the gallbladder, which can lead to acute attacks or aggravation of the disease. Patients with hyperlipidemia, coronary heart disease, cerebrovascular accidents, etc., eating mooncakes will increase blood viscosity and slow down blood flow, which is not conducive to the recovery of cerebrovascular disease and even induce myocardial infarction. The occurrence and development of seborrheic dermatitis, acne and other skin diseases are related to excessive intake of sugar and fat, so eating too many mooncakes can increase the secretion of sebaceous glands in these patients and aggravate their condition. For patients with gastric and duodenal ulcers, eating too many mooncakes can promote the secretion of large amounts of gastric acid, which can increase the stimulation of the ulcer surface, and in severe cases, can induce complications such as gastric bleeding and perforation. Salty mooncakes contain more salt, so patients with nephritis should be cautious when eating them because they may aggravate the burden on the kidneys and edema due to water and sodium retention, which may aggravate or worsen their condition.