Lumps are very common after standard liposuction. Most go away in 6weeks to 3 months with massage.
Some 20% of people do complain of some skin irregularity long term after traditional liposuction-these are called contour deformities.
New laser liposuction seems to leave smoother skin after liposuction. Laser liposuction has also been used to dissolve bumps left behind by standard liposuction.
There is an article about laser liposuction
for lumps, bumps and skin irregularities on Ezine.