On World Cancer Day, while early screening and diagnosis receive much attention, one early sign of cancer often goes unrecognized—unexpected weight loss. In an era when many are keen to shed pounds, especially the younger population, this symptom is sometimes mistakenly seen as a positive outcome of dieting or exercise. However, losing a significant amount of weight without a clear reason—such as changes in diet or exercise routines—should serve as a red flag.
This phenomenon, known as cachexia, occurs when cancer increases the body’s energy demands while simultaneously reducing appetite. The result is a loss of both muscle and fat, often accompanied by fatigue and weakness. Experts note that several cancer types—including lung, prostate, gastroesophageal, colorectal, ovarian, non-Hodgkin lymphoma, and pancreatic cancers—can manifest with unexplained weight loss.
To stay alert, Cancer Research UK recommends weighing yourself weekly at the same time and in similar clothing to accurately monitor any changes. Observing how your clothes fit, along with other symptoms such as fatigue and dizziness, can provide crucial early clues. If these signs are present, it is important to consult a doctor or undergo appropriate screening. Medical advice can help ensure proper hydration, nutrition, and rest, which are essential for maintaining health. Interestingly, while some cancers cause weight loss, treatments for conditions like breast and ovarian cancer, such as hormone therapy or chemotherapy, may sometimes lead to weight gain.
