Unexplained weight loss
“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. Losing weight can be a side effect of many different cancers such as oesophageal, pancreatic, liver, and colon, but it’s an especially common symptom of leukaemia or lymphoma, says Dr Wender.
Everyone has low-energy days. However, if you feel tired every day for more than a month, or experience shortness of breath when you didn’t before, see a doctor, says Dr Wender. Leukaemia and lymphoma commonly cause persistent fatigue. “Most of the time it won’t be cancer, but get it checked because you never know,” he says.
If you’re not prone to migraines and never get headaches, but suddenly find yourself popping pain meds all the time, it could be a sign of a brain tumour, which causes pain by pressing on nerves.
Sign up here to get Reader’s Digest’s favourite stories sent to your inbox.