Coolsculpting Side Effects from their website

At 1 to 2 weeks after treatment, there may be redness, bruising, and swelling; tenderness, cramping, and aching; itching, skin sensitivity, tingling, and numbness. In some cases, numbness may persist for several weeks after a treatment. Talk to your doctor if these side effects persist past 2 weeks or worsen over time.Rare side effects include:

  • Paradoxical hyperplasia: Visibly enlarged tissue volume within the treatment area, which may develop 2 to 5 months after treatment. Surgical intervention may be required.
  • Late-onset pain with a typical onset several days after a treatment and resolution within several weeks.
  • Freeze burn: First- and second-degree freeze burn may occur during treatment. It typically resolves without sequelae with proper care.
  • Vasovagal symptoms: Dizziness, lightheadedness, nausea, flushing, sweating, or fainting during or immediately after the treatment.
  • Subcutaneous induration: Generalized hardness and/or discrete nodules within the treatment area, which may develop after the treatment and may present with pain and/or discomfort.
  • Hyperpigmentation: Hyperpigmentation   ( dark spots light spots) may occur after treatment. Typically, it resolves spontaneously.
  • Hernia: Treatment may cause new hernia formation or exacerbate pre existing hernia, which may require surgical repair

This is a relatively speaking new procedure, their latest updates were in 2013 vs Thermage over 15 year safety record and 7 years with Exilis

PS the definition of hyperplasia



noun: hyperplasia; plural noun: hyperplasias
  1. the enlargement of an organ or tissue caused by an increase in the reproduction rate of its cells, often as an initial stage in the development of cancer.