We’ve all experienced that moment of spotting an unusual symptom and immediately searching online for answers. However, when it comes to cancer, internet information can often be misleading, confusing, or inaccurate.
Recent studies show an increase in various cancers—including rectal, colon, blood, breast, and kidney cancers—among people under 50. This shift makes recognizing early warning signs more critical than ever.
In its early stages, cancer can present subtle symptoms that are easy to overlook, such as unexplained weight loss, swollen lymph nodes, and persistent fatigue.
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While these signs do not always indicate cancer, Dr. Anthony Cuncliffe, GP and Lead Medical Adviser at Macmillan Cancer Support, warns against ignoring them—especially if they persist for more than three weeks.
To raise awareness, Dr. Cuncliffe outlines six crucial symptoms that everyone should know:
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Unexplained or Changing Lumps
It’s common to find bumps or lumps on the body, and most are harmless. However, any new or changing lump warrants prompt medical evaluation. “A new or evolving lump anywhere on the body should be checked early,” Dr. Cuncliffe advises, stressing that even lumps that seem insignificant could be important.
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Skin Lesions
Be vigilant about any skin areas that change in color, texture, or shape—this includes moles, freckles, skin tags, or spots. “Look out for new pigmented lesions or those that change shape, border irregularity, or uneven colors,” says Dr. Cuncliffe. Early examination of such changes is essential.
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Unexplained Bleeding
Bleeding without an obvious cause like injury should be evaluated by a doctor. This includes bleeding from the rectum, blood in stools, unusual bruising, or bleeding inside the mouth. Dr. Cuncliffe emphasizes that any new bleeding signals the need for medical assessment.
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Changes in Bowel Habits
A persistent change in bowel habits lasting more than three weeks—such as diarrhea, constipation, or changes in stool appearance—should prompt a GP visit. “Even minor alterations persisting beyond three weeks require investigation,” explains Dr. Cuncliffe.
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Persistent Cough
Although coughs are common, any cough continuing for over three weeks should be checked to rule out serious conditions like lung cancer. This advice applies to everyone, regardless of smoking status.
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Unexplained Weight Loss
Unintended weight loss is a warning sign that should never be ignored. “If you’re losing weight without trying, it’s vital to get checked as it might indicate cancer or other diseases,” Dr. Cuncliffe notes.
Dr. Cuncliffe advises against panic but stresses the importance of not brushing symptoms aside. The guideline of three weeks is a helpful timeframe to distinguish between common, short-lived issues and those needing medical evaluation.
Early detection remains key: the sooner cancer is diagnosed, the better the chances of effective treatment. “While many symptoms may not be cancer, it’s essential for people to come forward and share their concerns with their healthcare provider,” he concludes.