Hello, The pain that he is having can be due to Musculoskeletal inflammation - This can be diagnosed if the pain increases on specific movements or on direct pressure on the affected area. Such pain can respond to medications like Ibuprofen taken three times a day. This generally resolves within a week. ‎Pneumonitis Or Pleuritis: Here the pain increases on deep breaths and is associated with symptoms like a cough, expectoration of mucus or purulent sputum, etc. GERD: This condition too presents with the similar symptoms as described by you and usually subsides after taking Antacids or proton pump inhibitors group of drugs. It is important to rule out the exact cause after physical examination and investigations. Hence, please see a Primary Doctor for a complete examination and the treatment would follow according. Hope I have answered your query. Let me know if I can assist you further. Take care Regards, Dr Ivan R. Rommstein, General Surgeon