On the Internet, some sites outside the U.S. use the compound designation milliard/billion to designate the number 1 000 000 000. In science, the names of large numbers are usually avoided completely by using the appropriate SI prefixes. Thus 10 9 watts is a gigawatt and 10 12 joules is a terajoule.
Blood thinners like warfarin (Coumadin) can make you bleed more easily -- including from your gums. Some anti-seizure, blood pressure, and immune-suppressing drugs make the gums grow too quickly. The new gum tissue is more delicate and may bleed when you brush it.
One of the most common causes of bleeding gums is gum disease, also called gingivitis or periodontitis (periodontal disease). Gum disease can cause the gums to bleed while eating, randomly during the day, or after brushing or flossing the teeth. Other causes are more related to lifestyle choices, such as following an unhealthy diet, which reduces the amount of nutrition that oral health needs.