Common side effects are usually mild, and may include pain or decreased sensation in the targeted area. Some people may feel faint, nauseated, or dizzy during the procedure, or may develop a rash, swelling, or other discoloration afterward. But these side effects typically resolve on their own in the weeks following the procedure, Zeichner says.
CoolSculpting can be unpredictable, Matarasso adds, noting that the person undergoing the procedure may be disappointed if their results aren’t what they expected.
What Is Paradoxical Adipose Hyperplasia?
It occurs when CoolSculpting triggers an increase, rather than a decrease, in fat cells in the targeted area. Over the course of several months following the CoolSculpting treatment, PAH causes new tissue to grow in the shape of the treated area. The new tissue is usually harder than normal fat, and may have an almost rubbery texture, Matarasso says. Blood flow to the affected area may also increase.
In some cases, new fat growth can’t be removed using liposuction, Matarasso says, and the patient must choose between having the new tissue surgically removed or leaving it in place.
“This is terrible, because they had someone who wanted a minimally invasive procedure,” he says, “and then they end up with a big scar.”