I have had a low haemoglobin for over 2 years despite taking iron. My haemoglobin is in the region of 10. My rheumatologist says it is the anaemia of chronic ill health. The first investigations are usually more sophisticated blood test that look at things like your total iron stores and platelet levels. You will probably also be checked for bleeding in your stomach and bowel.
I do think the fatigue with anemia and the PMR fatigue combined can be difficult to cope with.
Evidently, my iron levels are fine .... its other things that aren't. Platelets? It's all foreign to me. I was told it needs further investigation and I can't help with diet. When you get hit with fatigue from two different sides it does make life difficult. PMR is not a death sentence and I should be grateful for that. I suppose!
Yes I have cooleys anemia a mediteranean blood condition which plays very well with PMR so my blood is up and down constantly. I get blood work every month and have copies in a ledger so I can track myself. It wreaks havoc on life some days exhausted other days ok I just never know. I do take a host of vitamins to try and help the immune system. Best wishes to you its a long process. Sorry about the spelling
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Problem with sleeping PMR and costochondritis. 
Can PMR cause kidney problems?
Blood vessel inflammation PMR?
Not strictly a PMR problem
Blood Tests to monitor PMR?
