Is it just me or has anyone had similar problems,i had the mirna coil fitted for my endometriosis,within a few weeks i had terrible joint/muscle pain,my esr was raised and was sent to see a rheumatologist,cut a long story short im now being treated for Rheumatoid Arthritis ,its a horrid debilatating disease that started at the same time as the mirena coil was inserted,well five weeks post insertion.I have to take some horrid medicine and have had my knees drained several times of fluid,i wake up every morning with joint stiffness,i hope it gets better,i do believe the mirena caused this.