Bleeding gum are caused by inadequate plaque removal .This will caused the gum to become inflamed .Which may cause them to bleed when brushing or flossing.this is called gingivitis and is the first stage of gum disease
Next Steps
please visit to dentist to removal of plaque and calculus by dental scaler
Health Tips
use a soft toothbrush and brush properly,floss at least once a day and be sure to floss beyond the gum line to remove more plaque,rinse with warm saline water to keep the area clean