Black spots on lips may be the precursor of bowel cancer, and you can determine whether the black spots on lips are caused by bowel cancer through the clinical manifestations such as whether there is a change in bowel movement, colonoscopy and so on.
Patients with bowel cancer may have black spots on lips, which are mainly related to the melanin deposition on lips under the influence of cancer, and may also form black spots on toes and soles of feet.
For patients with intestinal cancer, clinical symptoms mainly include change of bowel habit, such as diarrhea, constipation and diarrhea alternately, change of fecal appearance, urgency, i.e. abdominal pain, wanting to defecate, but always feeling unclean, blood in stool, i.e. fecal matter is bright red or tarry, abdominal pain, fatigue, fatigue, and weight loss.
People with corresponding symptoms and dark spots on the lips can clarify whether they have bowel cancer by undergoing colorectaloscopy, pathological biopsy, and imaging tests after active medical consultation, of which pathological biopsy is the gold standard for confirming the diagnosis of the disease.