Hi, my mother is 82 and is on blood thinners, type 2 diabetic pills, has COPD, and congestive heart failure. This regime of medications has been pretty stable for her for the past 5 years or so. My question is...she is complaining that she has a rough tongue and has this gritty sand like stuff on her tongue. When I looked at it, it looks fine. I don t see anything. Is it something she is eating or her meds? It s been weeks 5 or 6 weeks that she s had it. Violet