Diaphragmatic palsy is a paralytic rise of the diaphragm on one or both sides with impaired movement due to damage to the phrenic nerve and blockage of nerve impulses. It has a wide range of causes, most commonly caused by compression or invasion of the phrenic nerve by lymph nodes that have metastasized from lung cancer to the mediastinum. So how can we check whether we are suffering from diaphragmatic palsy? In unilateral diaphragmatic palsy, lung volume can be reduced by 37% and ventilation by 20%, but due to compensatory effects, patients are often asymptomatic, and the elevated diaphragm and paradoxical movements are detected incidentally during chest X-ray examination. Some patients complain of dyspnea during strenuous exercise. Left-sided diaphragmatic palsy may have gastrointestinal symptoms such as belching, abdominal distention, and abdominal pain due to an elevated gastric fundus. In bilateral complete diaphragmatic palsy, the patient presents with severe dyspnea, paradoxical abdominal breathing (depression of the abdomen during inspiration), labored breathing and auxiliary respiratory muscle mobilization. There are usually signs of respiratory failure such as cyanosis. In patients treated with mechanical ventilation, most result in ventilator dependence. There is a tendency to have recurrent episodes of pneumonia and pulmonary atelectasis due to restricted lung expansion and weak sputum expulsion.