The best way to stop bleeding gums is to see the dentist.
There advice might include some of the following tips:
Use a soft toothbrush– and brush properly! Brush your teeth for at least two minutes twice a day and after meals. Hard brushing can further damage the soft tissues of your mouth.
Floss at least once a day and be sure to floss beyond the gum line to remove more plaque.
Control bleeding by applying pressure to the area with a cold compress.
Rinse with salt water or hydrogen peroxide to keep the area clean. Avoid mouthwashes that contain alcohol, which can dry out your mouth.
Stay away from smoking and other tobacco products, which can aggravate bleeding gums.
Eat a balanced diet and limit snacking between meals. Carbohydrates and sugars feed dental plaque.
Have your dentures aligned as needed.