I'm suffering from acidity and I have to force vomit to reduce burning. Cause of concern is vomit color is dark brown/rusty. This happens less frequently than before. Earlier, 2 yrs back I used to have so much acidity as of today. Now once in month I face this problem. May be ulcer is treating itself but not completely. Need suggestions. Attached is pic of vomit and it's sticky. I suspect it is ulcer coz this doesn't happen all the time like before. P.S. I don't consume alcohol nor smoke and follow vegetarian diet.