2 weeks ago I noticed a lump at the top of my nasal bridge, slightly off to one side. It feels like a small ball. My doctor initially said it's probably a lipoma, but I saw a dermatologist today who felt it and immediately asked if I had an injury (so I told him about the rhinoplasty), then said it felt like cartilage. I'm concerned because it really seem to pop up suddenly. It's painless (when I move it around a lot I feel like I get a dull ache in the area). Could this be a result of my rhino?