iStock/ChesiireCat A sore throat can make swallowing hard or painful, but if you notice it persists for a few weeks and gets worse, see your doctor. This is a common sign of throat or stomach cancer and could also be an early sign of lung cancer. Find out how to tell if difficulty swallowing is related to thyroid cancer symptoms.
iStock/lzf You wake up with one mysterious bruise—probably not reason to worry, maybe you bumped into something stumbling to the bathroom last night. But if you start to notice bruises popping up all the time, especially in strange places like your hands or fingers, it should raise an alarm. Easy, unusual bruising can be a sign of leukemia, according to Cancer Treatment Centers of America. Over time, leukemia impairs the blood’s ability to carry oxygen and clot.
Unexplained weight loss
Andrey_Popov/Shutterstock “Weight loss for a lot of Americans is a good thing; everyone’s dieting—but if you have less appetite when you usually have a good appetite, and there’s no big life event or problems happening to cause that, get it checked out,” says Dr. Markman. Weight loss or unusual changes to appetite can be a sign of many cancers—such as esophageal, pancreatic, liver, and colon—but it’s an especially common symptom of leukemia or lymphoma, says Dr. Wender. Here are some more symptoms of pancreatic cancer you might ignore.