Hi,
My sister is 26 year old and has very low haemoglobin. It was around 9-9.5 and we thought of consulting doctor. Around 3 months ago Doctor put her on iron tablets. After few days she developed severe joint pain (knees, shoulders and neck) and they even started swallowing. She also started getting a lot of fever (of the order of 102-103). At the same time doc conducted one blood test and her esr was found elevated. She was then put on calcium tablets. Her joint pain has definitely reduced but since then she has been suffering from frequent fevers (once in around 5 days that too after taking regular medicines). Also, her ESR level reached very high levels(recent result shows 140 mm/lst hr).
The doctor conducted few tests for artheritis but all were negative. Chest X-Ray and Ultrasound (abdomen) too didn't reveal anything. Everything was fine. Apart from elevated ESR (140) and low Hb (8.6), everything was normal in her latest blood report including (WBC, TLC, platelet count, leucocyte count ).
It has been around 1.5 months that these cycles of fever has been going on. A slight increase in pus cells were reported in one of the urine tests but nothing else. I also observed that she gets fever as and when she feels little restless and the fever accompanies with pain in her one of the knees.
We are completely clueless about all these proceedings . Could you please advise regarding this and let us know what probably could be the reason behind this.
Attaching her latest blood report.

Thanks,
Gurpreet