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You suffer from GERD
which is gastroesophageal reflux. In order to treat this, firstly stop smoking
and drinking alcohol as they make it worse. Avoid lying down immediately after a meal, you may lie at an incline, head up by 15-20cm for 2 hours before going to bed. Avoid spicy food. Eat bland, soft diet
, milk as well. Regarding the resin, if you feel tightness around the chest, I suggest you get an ECG forst. After that get an X-ray Chest to see if there's any problem in your respiration. If they are suggestive of lung problem, you may need medication and/or chest physiotherapy
consisting of breathing exercises.