More and more fluid in the right lung may be caused by hypoproteinemia, uncontrolled primary disease or tuberculous pleural effusion. 1. Hypoproteinemia: the extraction of fluid from the right lung may lead to loss of albumin, resulting in hypoproteinemia. The lower the albumin, the more fluid will leak out, which leads to the phenomenon of more and more fluid being extracted from the right lung, so the right lung should be replenished with albumin after the puncture to alleviate the symptoms. 2. Uncontrolled primary disease: If the malignant pleural effusion which is not controlled by the primary disease is transferred to the right lung and leads to the increase of the effusion in the right lung, the pressure will be lowered after the extraction of the effusion in the right lung and at the same time will aggravate the formation of the effusion, and the phenomenon of the more and more effusion in the right lung may occur, and the cause of the disease needs to be treated at this time. 3. Tuberculous pleural effusion: this disease may also lead to more and more effusion, which requires regular anti-tuberculosis treatment. Therefore, patients with more and more effusion in the right lung should find out the cause of the disease as soon as possible, and actively cooperate with doctors to treat the cause of the disease after diagnosis.