Foreign body. Atelectasis is common in children who have inhaled an object, such as a peanut or small toy part, into their lungs. Narrowing of major airways from disease. Chronic infections, including fungal infections, tuberculosis and other diseases, can scar and constrict major airways. Tumor in a major airway.
He'll be placed on blood thinners to break up the clots...which can take from days to weeks. This is also a very dangerous time for him, as a clot could travel and lodge in a coronary artery on his heart, causing a heart attack, or it could travel and lodge in an artery in his brain causing a stroke.
Nosebleeds (also known as epistaxis) are common and are generally temporary. Most nosebleeds can be controlled within 10 to 30 minutes and can be cared for at home. Bleeding can occur on one, or both, sides of the nose. Your blood might flow out of your nose and/or down the back of your throat. Bleeding can last for a few seconds or a few minutes or longer and range from a few drops to a rapid flow. Nosebleeds usually stop when a blood clot forms. The blood clot is loosely attached to the mucous membranes.