The causes of intestinal edema are mainly certain digestive diseases, systemic diseases and hypothyroidism, etc. The symptoms and manifestations are different depending on the causes. 1. Digestive system diseases: enteritis, cirrhosis of the liver, etc. can lead to edema of the intestinal mucosa, which may cause fever, abdominal pain, diarrhea, nausea and vomiting. 2. Systemic diseases: some systemic diseases can also lead to edema and thickening of intestinal mucosa, such as scleroderma, systemic lupus erythematosus and other connective tissue diseases, which can be manifested as fever, nausea, diarrhea, constipation, etc. In addition, it may also have fatigue, anorexia, yellowing of the face, and pteronticular erythema on the face and other manifestations. 3. Hypothyroidism: when hypothyroidism, thyroxine secretion is reduced, which will cause slow metabolism in the patient’s body, and also lead to intestinal mucosal edema, mainly manifested as fatigue, edema, chills, abdominal pain and so on. In addition, other diseases can also lead to intestinal mucosal edema, the above symptoms should go to the hospital in time to improve the relevant examination, under the guidance of a professional physician to clarify the cause of the disease, and carry out the corresponding treatment.