Hi Amanda, I appreciate your effort for reply. I looked into Transient Synovitis symptoms, explanation, and no , it is not that :(. It happens mostly with kids 3-10 years old and it will usually affect hip area also it takes 1-2 week to heal. With me it takes 2 days to heal by itself and it happens in any of joints (single not pair) / ligament area connection with joint... hopefully someone will come up with similar issue, fingers crossed