hello, I need to know more about the symptoms, like precipitating factors, factors that increases pain etc. Since you are young, we are keeping the possibility of heart disease little lower. I guess the pain is not exertional and relieved with rest, which is typical of cardiac pain. It can be a gastritis and reflux disease. Do you upper abdominal pain, nausea, bloating, burping, increase in pain on food, sour water feeling in throat or chest burning, if yes it further supports the diagnosis. You should avoid fatty, oily and high calorie diet. Have some walk after having food instead of taking rest. Have multiple small meals instead of heavy meals. Have regular sleep habits and avoid stress. Lots of green leafy vegetables, fruits. Avoid smoking and alcohol if any. You can get prescribed tab Pan DSR 40 mg beforebreakfast once a day for 2 weeks. Secondly does this pain increases on applying pressure over the area, if yes it could be costochondritis and it s a musculoskeletal type of pain and needs prolonged nsaid therapy. Does this pain increases on deep breathing and coughing etc. if yes it a pain arising from lining of lungs and needs nsaids treatment and evaluation.