My mom is 69 yrs old she is diabetic is on blood thinners and water pills. what does it mean when a doctor says my moms blood is too thin?

Here's a guess:: I don't know the details of your mom's condition. She may be on Coumadin (warfarin) - a common anticoagulant which "thins" the blood and prevents blood clots. Coumadin (warfarin) must be carefully monitored by a blood test. If there is too much anticoagulation effect, a person may have bleeding complications. When there isn't enough anticoagulation, a person may have a blood clot. It's a delicate balance. Lgromkomd.