Chronic fatigue is another key warning sign that is often underestimated. Many people experience tiredness due to busy lifestyles, poor sleep, or stress, but cancer-related fatigue tends to be persistent and profound, even after rest. In colorectal cancer, this exhaustion may result from internal bleeding within the digestive tract, leading to anemia and reduced oxygen delivery to tissues. Doctors describe fatigue as one of the most common but least recognized symptoms, emphasizing that persistent weakness should prompt medical testing, especially in individuals with other risk factors.
