From few days i am suffering from gas. For two days , i felt pain on the right side just below the lungs(might be in liver). I felt that pain while walking only(not while sitting, standing or running). That pain feels like gas pain which also travels to the right side chest and thn to the back.After exercise it fades away. Today, in evening i had small foam vomit. Sometimes i feel pain just below the centre of lungs( may be in upper part of stomach). Please help me. What should i avoid to eat. Currently medicines available at home for stomach- himalaya's gaseous and acidity & Aristozyme.