Especially if you're taking medications that might cause bleeding, any unusual bleeding should be reason enough for consulting your medical advisor. While things like coumadin are pretty well known, there are many other medications commonly used today that can cause unexpected bleeding, and sometimes a combination of things with low individual likelihood of excessive effect can, together, have a very strong and "nearly invisible" effect.

The real hazard is that excessive bleeding from minor cuts may indicate that you've been "dosed" to the point that internal bleeding becomes common, and you're not likely to notice it until you've lost enough to be serious.

Once you've established what's "normal" for you, with the medications you're taking, and that your "normal" is safe, there's less reason for concern; but if this is "something new" a check for less visible effects might be advisable.

Your advisor may be satisfied with a hemoglobin count, or may want the "turd smear" to rule out anything internal, but neither of those are invasive or difficult - or require real interruptions in normal activities.

John