Why Do We Swell Up So Much After Cosmetic Surgery?

When there is any tissue damage, the body sets off a histamine mediated chemical reaction, initiating the inflammatory response

The significant tissue injuries from a surgery like liposuction or a tummy tuck often result in an overactive immune response. 

In Addition! Lymphatics are compromised during these surgeries so they can't help with the clean-up as efficiently and drainage.

Healing Response Factors: 

Extent, and type of tissue damaged; general health

— Emily W