Lip black spots must be colon cancer?

Lips long black spots it may be a symptom of intestinal cancer, because some diseases in the intestine can cause such symptoms. For example, intestinal polyps will cause such symptoms, if the polyps are not treated early, cancer may occur later; there are times when lips long black spots, may be caused by some melanin precipitation. If you show lip black spots, you must go to the local public hospital as soon as possible to do a clear examination to see if he is the possibility of bowel cancer. If it is bowel cancer, or intestinal polyps, you must be treated in time.