Hello, It appears to a acidity, gastritis and reflux disease. Brownish stuff is altered blood. Do you also have upper abdominal pain, bloating, burping, increase in pain on food, sour water feeling in throat or chest burning, these are the other symptoms and may be associated. You should avoid fatty, oily and spicy 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 should visit hospital for this. You can get prescribed tab Pan DSR 40 mg or esomiprazole domperidone combination beforebreakfast once a day for 2 weeks. If not adequately relieved, then you should add Syr sucral O or gelusil two teaspoon three times a day for a week. Hope this helps you and get back if you have any doubts.