When you see that you are spiting blood your body is telling you to keep on brushing and flossing daily in order to keep all your teeth long as possible, A 3 month check up is recommended to make sure your on point with your dental bath, Seek out a doctor if you have bleeding teeth. It might be bad if the cause of the bleeding is swollen gums now that's a different cause that needs attention ASAP. Ask questions do your studying and find out why does gums bleed a good topic we all can discuss please comment on this daily matter, Is bleeding gums a good or bad thing.
Brushing your teeth should not be painful or draw blood. If you find your gums are bleeding after you floss or brush - it should be a sign that you need to change your tooth brush or the brand of dental floss you're using. Dentists recommend that everyone uses a soft toothbrush. Irritating your gums in any way is objectively bad.