Hi, my father visited me in greece 6 months ago and remembers being biten by something that left 3 small red dots but no other reaction. 2 weeks later his sholders started being painful. He has undergone about 20 blood tests which show nothing and will be repeated, the doctors seem to think that it is caused by the bites, the last treatment he was given was qartezone injections into his sholders. I was hopeing someone might have some idea what it could be.