A fecal calreticulin test of 40 μg/g does not necessarily mean that it is normal, although the reference value is about 0-50 μg/g, but this does not mean that the patient’s intestines are not problematic, and it may be related to irritable bowel syndrome, which needs to be examined in time to find out the cause of the disease, and then treat the cause of the disease. Calcineurin refers to a calcium-zinc binding protein derived from neutrophils and macrophages, which can be found in plasma and feces. Generally speaking, intestinal inflammation can be determined by measuring the concentration of calreticulin in feces, and its reference value is about 0~50μg/g. If the actual test value is 40μg/g, it means that the normal range is not exceeded. However, this is not absolute, the patient’s intestines may have certain problems, such as irritable bowel syndrome, so this time to timely carry out further examination, so as to better understand the disease. After the cause of the disease is clarified, the patient should be treated under the guidance of the doctor, and always pay attention to changes in the value of calprotectin, so as to avoid aggravation of the disease. In addition, in normal times, patients should pay attention to diet, eat more fresh vegetables and fruits, drink more water, eat less spicy and stimulating food, and pay attention to sleep, go to bed early and get up early, keep the bowel movement, so as to promote the recovery of the disease.