[DoctorTan]

My own interpretation of "heaty" is inflammation.

There are blood tests to determine the level of inflammatory stress on the body.

Of course, I think for TCM practitioners, the term "heaty" refers to a lot more than that.

Until a TCM practitioner is able to tell us what the biochemical rationale behind "heaty" and "cooling" is, there will unlikely be a test that can actually test for it.