Hi, had a FBC taken a few weeks ago, have them done every few months to check iron levels and thyroid etc.. Haemoglobin was normal, but platelets came back at 448(upper limit normal 440). Asked my GP about it, and she said we would repeat it in a couple of weeks, so we did, and it was 460. She looked back my blood results, and it seems for the last year and a half anyhow, my platelets have been between 420 - 460, highest been March 2011 they were at 487.
She isnt concerned about this, and thinks it is just my normal, and it isnt progressively getting higher. She does want to check it every 4-6 months, just to check doesnt start to climb.
She also checked my ESR and CRP as had been getting some pain in my finger joints, but that is all normal.
Im 37, have underactive thyroid after treatment for graves 8 years ago, and have had problems with low iron/ferritin levels in past(not sure what my current ferritin is, but was low last year, not taking any iron at present).
What could the reason be for this? Is it possible just my normal? Im fit and healthy otherwise. Does it sound like anything to be concerned about?