A frequent illness, pulmonary embolism can cause considerable morbidity and mortality. Certain inherited and acquired risk factors predispose vulnerable individuals, and the clinical situation can arouse suspicion. Studies involving people who had non-alcoholic fatty liver disease were sought after in the Medline, Pubmed, Embase, NCBI, and Cochrane databases. Analysis was done on incidence, etiology, and treatment options. Because PE presents differently in each patient, it is important to take that into account. The accuracy of the diagnosis decreases with patient age. The diagnosis is difficult because of comorbidities like bronchopneumonia, Chronic Obstructive Pulmonary Disease (COPD), asthma, or chronic fibrosing pulmonary processes The clinical diagnosis of pulmonary embolism is extremely ambiguous because none of the symptoms or signs related to pulmonary embolism are distinctive and can all be caused by other cardiorespiratory illnesses. Patients who have an abnormal perfusion lung scan require more sophisticated care. It can be difficult to diagnose conditions when they have comorbid conditions like bronchopneumonia, chronic obstructive pulmonary disease (COPD), asthma, or chronic fibrosing pulmonary processes. The diagnosis of PE can be made quickly in patients who have DVT, though. Thrombosis of the renal, iliac, and inferior vena cava veins, as well as DVT, were the main causes of up to 85% of PE cases.