is a very non-specific test for inflammation that can be elevated by any number of inflammatory processes. If there is no pain, infection, or obvious inflammation being experienced by your brother in law, I would not consider the ESR concerning in any way. The main question I have is why did the doctor order it in the first place? Perhaps it was part of a panel of blood tests to monitor the course of joint pains
, headache, muscle pains, ongoing infection, etc.
In short, this test is not used to diagnose anything and does not require any treatment unless it can be correlated with an actual, ongoing inflammatory process.