Whether pulmonary effusion is serious or not needs to be combined with the cause of the disease and whether the treatment is timely, of which tuberculous pulmonary effusion, inflammatory pulmonary effusion is generally not serious, and tumor pulmonary effusion is more serious. 1. Tuberculous pulmonary effusion: Tuberculous pulmonary effusion is generally not very serious and should be treated with anti-tuberculosis therapy in time, as long as you can actively accept the treatment, you can effectively control the condition. 2. Inflammatory hydrocele: Inflammatory hydrocele is generally not serious, and anti-inflammatory treatment can be actively selected to reduce the incidence of effusion, but also better control of the condition. 3. Tumor pulmonary effusion: If the tumor pulmonary effusion is relatively serious, it may be followed by bacterial infection, serious heart failure as well as kidney failure, which may endanger life at any time. Whether the pulmonary effusion is serious or not should be analyzed in the light of the actual situation. In order to avoid the risk, it is recommended to go to the hospital in time to receive treatment, so as not to jeopardize the condition.