I have a bite on the upper portion of my butt and I have been putting Neosporin on it. Since the bite I have random slight knee pain in that leg and it occasionally gives out. I am now thinking it may be from a brown recluse spider. I garden outside. The bite happened a little over a week ago and I am now putting the two incidents together. The original bite with the red circumference was about the size of a quarter. Anything making sense here? My knee still gives out on occasion with some mild pain behind it. Related? What can I do?