What are the symptoms of early bowel cancer?

In the early stages, when bowel cancer can be more easily cured, there are few, if any, symptoms. After that, these are the symptoms to look for:

Bleeding from the bowel. While this is the most important symptom, it does not always mean that bowel cancer is present.

Abdominal symptoms such as pain, bloating, weight loss or mucous in bowel motions.

Change in bowel habit, ranging from constipation to persistent diarrhoea.

Low iron levels, which can cause anaemia and tiredness.