1-Presence of blood in the stool
This one is the most alarming symptom of colorectal cancer. Sometimes the tool may appear very dark or black, signifying the presence of dried blood and other times you may notice fresh red blood, or it may not be visible to the naked eye.
In fact, the severity of symptoms usually depends on the location and advancement of the cancer. if find any visible signs of blood in the stool, it is recommended to see the doctor for an evaluation.
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