I developed a seroma after lipo of abs/flanks. I have irregularities. Are they permanent? Can anything be done? (Photo)

I am 50 years old, 8 months post vaser lipo of abs and flanks. After drains were removed a seroma formed on right side and was drained by syringes 9 times over 2 weeks. I now have a slightly collapsed area with wavy diagonal "lines" or "creases". Still tender feeling also. What was the likely cause and can this be corrected? Is revision possible or risky? I was diligent with pre/post op care. Also have a small lump to the left of my navel that I'd like gone. Pictures are attached. Thank you.