I had a similar issue with a hip that kept draining . As in your husband's case, Dr also said to me that it wasn't infected. After enduring months of concerning draining, we finally went to a second opinion. Turns out it HAD been infected and that whole time, the (two!) injections consumed so much of the tissue around my hip that when the Dr had to go in to remove it, I didn't have enough bone left for it to be replaced again. I looked into suing the first Dr, but because I never exhibited any fever or other typical infection symptoms, he was apparently within a reasonable standard of care. Lesson here: get a second opinion!