I've never heard of the needle being left in too long, but I'm no doctor. Is it truly baseball size? Cause if so, I would definitely go to a doc. Very rarely is a lump that large 'OK.' Also, I'm assuming this lump is at the injection site? I'm asking, because I've known people who inject and a day or two later had swollen glands under their arms (their own mistake as well, not the gear). Also, how often do you inject and do you rotate sites?
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