<s>[INST] I am 15, female, average weight and no other health problems or allergies. About 4 weeks ago i fell ill with a bug and was sick. afer a day or two i recovered, but started having a heavy pain in my chest and for about a week it carried on. The week after that it started to go away and then the week after that it kept coming back randomly every now and then but more like a stabbing feeling across the left side of my chest. What is it, angina? [/INST] Hello, Mostly its 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 tablet Pan DSR before breakfast once a day for two weeks. Secondly does this pain increase in applying pressure over the area, if yes, it could be Costco Chat Doctor.  Does this pain increase on deep breathing and coughing etcetera. If yes, it is a pain arising from the lining of the lungs and needs NSAIDs treatment and evaluation. Hope I have answered your query. Let me know if I can assist you further. </s>