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.
Symptoms of dry mouth include sticky mouth, dry and cracked lips and tongue, sore throat, cavities, and more. A dental abscess, a severe tooth infection, can cause throbbing pain, swelling, redness, fever, and more. Dental cavities are tiny holes in teeth and can aching pain in the tooth and jaw. Gingivitis is a mild form of periodontal (gum) disease that can cause redness, swelling, and bleeding gums. Symptoms of heartburn and GERD are a burning feeling in the chest, throat, or mouth, nausea, and more.