As with all major surgery, liposuction carries risks, such as bleeding, infection and an allergic reaction to the anesthesia. Complications vary depending on how large the procedure, though bruising and swelling are normal. Liposuction side effects vary from patient to patient, and these are the most common: Bruising Swelling Discomfort Infection Numbness – usually temporary Extended healing time With today's modern techniques, potential liposuction side effects have been greatly reduced. Bruising usually disappears within a few weeks of having a liposuction procedure, and swelling will improve gradually over a few months. This is a powerful technique that has provided our patients amazing results.