Have had lower back issues for a while. Often symptomless during the day but kicks in at bed time or if I've been lounging on the sofa in the evening. I wake up several times in the night to shift position because moving around in bed is uncomfortable due to back stiffness and pain. A few minutes after getting up in the morning it virtually completely resolves. The GP did a blood test.
It has come back slightly raised and she is planning to refer me to a rheumatologist but wants me to go back for two further blood tests before then. She wouldn't be drawn upon what it might be.
Any thoughts based on symptoms?