Bleeding gums after brushing is not a precursor of liver cancer, but can be caused by many reasons, such as wrong brushing posture, gum inflammation, hard toothbrush, cirrhosis of the liver and so on. 1. Wrong brushing posture and hard toothbrush: patients with wrong brushing posture and hard toothbrush can’t avoid damaging the gums and causing bleeding in the process of brushing. It is recommended that patients replace toothbrushes with soft bristles and learn the correct brushing posture. 2. Inflammation of the gums: plaque is formed when the patient has poor oral hygiene, and plaque will cause swelling and bleeding of the gums, which is very easy to bleed after brushing. 3. Cirrhosis: Cirrhosis of the liver leads to portal hypertension, resulting in splenomegaly and hypersplenism, which can cause a significant drop in platelet count, making it easy for the gums to bleed after brushing. There are many reasons for bleeding gums after brushing teeth, lack of specificity, patients should go to the local hospital in a timely manner, complete oral examination, liver ultrasound and other related examinations, follow the doctor’s instructions for treatment, patients are prohibited from taking medication on their own in order to avoid serious adverse reactions.