3. Sudden Weight Loss
An immediate and dramatic decrease in weight can be caused by a variety of cancers, one of them being colon cancer. The Mayo Clinic describes unexplained weight loss as the unintentional loss of 5% of your body weight within six months
For someone who weighs 150 pounds, losing 7 and 1/2 pounds within six months without changing diet, exercise or your sleeping pattern qualifies as “unexplained weight loss”.
Not only do cancer cells take plenty of energy, your immune system also uses energy to try to fight off the disease.