Symptoms of pain in the right rib cage, abdominal distension and chest tightness may be caused by pneumonia, which may also occur when suffering from pleural effusion and pleurisy. 1. Pneumonia: Pneumonia may cause pain in the right rib cage, abdominal distension, chest tightness and other symptoms, the patient may have fever, accompanied by nausea, vomiting, fatigue and other discomforts, the patient’s normal breathing will be affected, which may lead to respiratory difficulties, accompanied by varying degrees of cough. 2. Pleural effusion: pleural effusion can also cause pain in the right rib cage, abdominal distension, chest tightness and other discomforts, of which chest tightness and chest pain will be more obvious, patients may have frequent coughing, accompanied by coughing up sputum, and some patients may have blood in the sputum. 3. Pleurisy: pleurisy may also cause this kind of discomfort, the patient will cough, cough sputum, hemoptysis and other undesirable symptoms, violent cough or deep breathing will make the chest pain and chest tightness symptoms more obvious, some patients will have fever, chills. There are many reasons for such symptoms, such as cholecystitis, liver abscess, etc. It is recommended to go to the hospital in time for relevant examinations, and actively cooperate with the treatment according to the doctor’s advice.