The ductus arteriosus is a hole that allows the blood to skip the circulation to the lungs. However, when the baby is born, the blood must receive oxygen in the lungs and this hole is supposed to close. If the ductus arteriosus is still open (or patent) the blood may skip this necessary step of circulation. The open hole is called the patent ductus arteriosus.
Caring for a Bleeding Tooth. Some people mistakenly think that while brushing, a bleeding tooth is perfectly normal. It is not. Anytime there is any bleeding in the mouth, it is almost always a sign of periodontal disease. Even if you brush fairly hard, it should not cause healthy teeth and gums to bleed.
A toothache is a pain in or around a tooth that may be caused by: Tooth decay; Abscessed tooth; Tooth fracture; A damaged filling; Repetitive motions, such as chewing gum or grinding teeth; Infected gums; Symptoms of a toothache may include: Tooth pain that may be sharp, throbbing, or constant. In some people, pain results only when pressure is applied to the tooth. Swelling around the tooth; Fever or headache; Foul-tasting drainage from the infected tooth; When Should I See a Dentist About a Toothache? See your dentist as soon as possible about your toothache if: You have a toothache that lasts longer than 1 or 2 days; Your toothache is severe