You spit into the sink after brushing your teeth and see pink. You might brush it off and reason that it happens to everyone. However, there's something you need to know: healthy gums shouldn't bleed. If your gums bleed when you brush your teeth, your mouth is trying to tell you something that you should listen to. The good news? Bleeding gums are treatable and preventable in most cases. Here's what you need to know about why it happens, what's causing it, and when you need