Dear Sir, I am suffering from acidity problem since more than a year. And monthly or fortnightly vomiting happens. Once or twice end the end of vomit some blood also goes. Since last 4 days dark black stool going. Sometime I takes Cap Pepsia D and Tab O2. 3 year before same problem was coming and had abdomen sonography. But report was normal. Is there any serioir issue as in process I lost few kg (7)weight. Please note I don't drink.