If bleeding occurs between the gaps, consider the following causes: First, food impaction. When food impaction occurs, the food in the gaps is particularly crowded, which can damage the gums and make them bleed. If a toothpick is used for flossing, it is more likely that the gums will bleed and be damaged. It is recommended to floss and not to eat particularly hard and coarse food to prevent tooth blockage. If the gap between the teeth is particularly large, you should brush your teeth with a gap brush. Secondly, the presence of calculus inside the gap is a kind of bacteria that can cause inflammation in the gums, making the gums red, swollen, fragile and easy to bleed, which needs to be treated with dental cleaning. Third, if a gum tumor or hemangioma grows inside the gap, it will also appear that the gap is particularly prone to bleeding and needs to be treated by surgical removal.