If the gums bleed every time you brush your teeth, there are three main reasons to consider: First, and the most common reason, is gum inflammation. If you suffer from gingivitis or periodontitis, your gums will become visibly red and swollen, and become fragile and bleed easily. The main reason is that there are more bacteria and calculus around the teeth, and the products of bacteria will stimulate the gums to become inflamed, and then the gingivitis needs to be treated with dental cleaning. Second, systemic blood diseases, such as leukemia. The manifestation of leukemia in the teeth is easy gum bleeding, which requires special attention to the process of gum treatment and needs to be operated carefully to prevent causing more than bleeding of the teeth and gums. Third, you can consider the possibility that the toothbrush applied for brushing teeth, the texture is relatively hard, irritating the gums, so that the gums break and bleed, you need to replace the toothbrush with a softer toothbrush for brushing teeth.