Sorry I don't have any advice for you, but I can commiserate a little. I've been having a similar experience after my knee scope a month ago. The medial portal has a hard, painful lump under it. The lateral portal hurts a little, and the upper lateral portal causes no problems at all. My physical therapist told me that it is scar tissue and to massage it, and that it is prone to scarring since it goes through the fat pad. I've noticed the lump is a little smaller and less painful each week, but the progress is much slower than I expected.