There are many different kinds of cancer. What Causes Night Sweats? These then lead logically to examination of the lining of the intestine to seek a source for the bleeding. generic viagra It can also occur when cells forget how to die. What Causes Muscle Weakness? These people may need further evaluation of their small intestines for bleeding. generic viagra Cancer appears to occur when the growth of cells in the body is out of control and cells divide too quickly. What Causes Nasal Congestion? In some people, a source of bleeding can not be found in the esophagus, stomach or colon. generic viagra Normal cells multiply when the body needs them, and die when the body doesn’t need them. What Causes Neck Pain? These are most commonly found in the stomach and colon using standard endoscopic techniques such as:These investigations are particularly important in older patients since this bleeding is an important early sign of possible gastrointestinal cancer.viagra coupon viagra coupon viagra coupon