Warning Signs: When Should You See a Doctor?

Q: What are some general warning signs that shouldn't be ignored?

These include: a lump or swelling anywhere in the body, a sore or ulcer that doesn't heal within a few weeks, unexplained weight loss, persistent cough or hoarseness, changes in bowel or bladder habits, unusual bleeding or discharge, persistent fatigue, and a mole or skin patch that changes in size, shape, or colour.

Q: Does having one of these symptoms mean I have cancer?

No — most of these symptoms are far more commonly caused by other, less serious conditions. The point of this list isn't to cause alarm, but to know when a symptom is worth getting checked rather than waiting it out indefinitely.

Q: How long should I wait before seeing a doctor about a symptom?

As a general guide, a symptom that persists for more than two to three weeks, particularly if it's new, unexplained, or worsening, is worth having examined. Trust your own sense that something isn't right — you know your body best.

Q: Are warning signs different for men and women?

Some are specific — for example, a breast lump or unusual vaginal bleeding for women, or changes in the testicles for men — while many others, like unexplained weight loss or persistent cough, apply to everyone regardless of gender.

Q: What if my doctor doesn't seem concerned but I still feel something is wrong?

It's entirely reasonable to ask for further investigation or to seek a second opinion if a symptom persists and you remain concerned. You are allowed to advocate for yourself in these situations.

Q: Does having a family history of cancer change how I should think about symptoms?

It can — people with a strong family history of certain cancers are sometimes advised to be more vigilant or to start screening earlier. This is worth discussing directly with your doctor.