Common causes of pulmonary embolism in young people include the following aspects:

First, fractures, especially fractures of the lower limbs, are prone to deep vein thrombosis and pulmonary embolism;

Second, thrombophilia, some young people due to congenital genetic factors, which can lead to easy formation of blood clots in arteries or veins, and potentially increase the incidence of pulmonary embolism;

Third, prolonged immobilization, such as long periods of sitting, can lead to slow blood flow in the lower limbs, which might result in deep vein thrombosis and pulmonary embolism;

Fourth, other factors like severe infections could also trigger pulmonary embolism; furthermore, the risk of pulmonary embolism is also higher in pregnant women during the perinatal period.