Both ESR and CRP are non-specific markers for inflammation. Less than 20 is considered normal for ESR. Less than 1 mg/L is considered normal for CRP.
Many things can cause elevation in both tests. And people with inflammatory conditions can have "normal" results. If you find there is a correlation of your symptoms with your test results, keeping track of results could be helpful.
Neither of these tests seem to correlate with my symptoms. Pain doesn't seem to be any better or worse with ESR of 3 or 20. CRP has gone from 0.5 to 3.0 with the same issues. Rheumy checks both, along with liver function.
Also, there is another test called CRP-HS (high sensitivity) which measures the same protein to a lower range. Instead of mg/L, a lab may give results in mg/mL or mg/dL.
DX: Psoriatic Arthritis, Osteoporosis, Psoriasis
Meds: MTX since Oct 2009, 15mg/week. Cimzia-restarted after 2 yrs away.
Epidural Steroid Injections x8; Lumbar Radiofreq Ablation x2
SIJ Steroid Injection x3; Bilateral Radiofreq Ablation SIJ x9
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