Carcinoembryonic antigen 8.6ng/mL is not serious, the normal value of carcinoembryonic antigen is usually less than 5ng/mL, some inflammatory diseases can lead to mild elevation of this index, and also pregnant women and other normal people can see mild elevation of this index, generally do not need to be too worried. Carcinoembryonic antigen was first found in colon cancer and fetal intestinal tissue. Elevated carcinoembryonic antigen can be found in colon, rectum, pancreas, stomach, breast, hepatocellular, lung, and medullary thyroid cancers, as well as choriocarcinoma, bone, prostate, and ovarian cancers. In addition, a mild increase in carcinoembryonic antigen is seen in certain benign digestive diseases such as intestinal obstruction, biliary obstruction, pancreatitis, cirrhosis of the liver, colonic polyps, diverticulitis, and ulcerative colitis. Mildly elevated carcinoembryonic antigen can also be seen in pregnant women, smokers and the elderly. If carcinoembryonic antigen 8.6ng/mL is found, please relax, cooperate with your doctor to complete the relevant examinations, and follow the doctor’s instructions for treatment if necessary.