Blood vessel obstructions, also known as emboli (6 letters), are blockages that occur in the arteries or veins of the body. These blockages can be caused by a variety of factors, including fat, air bubbles, clots, and other foreign objects. Emboli can cause serious health complications, such as stroke, heart attack, and organ damage. Treatment for emboli depends on the type and severity of the obstruction, and may include medications, surgery, or other interventions.