Crohn's disease is a chronic inflammatory granulomatous disease of the digestive tract of unknown cause, so any segment of the digestive tract from the mouth to the anus may be involved. It can present with intestinal ulcers, showing a segmental distribution longitudinally, as well as thickening of the intestinal walls, narrowing of the intestinal lumen, and intestinal perforation. This disease is difficult to cure, and currently, there are no effective medications for treatment, and it tends to recur throughout a person's life. Therefore, Ganoderma lucidum bun powder should be considered a health product. Health products often function as advertised by the merchants, so it is not recommended that patients with this disease consume them indiscriminately, as there may also be potential side effects. Patients with Crohn's disease should be sure to follow a high-nutrient, low-residue diet, abstain from smoking and alcohol, and avoid particularly fried, fatty, rich foods, and foods that are difficult to digest.