The most common side effects are temporary bruising, swelling, aching, and tenderness. The treatment area may look or feel stiff, and transient blanching—temporary whitening of the skin—may occur. You may feel a sense of nausea or dizziness during removal of the applicator as your body naturally warms and sensation returns to the treated area. Short- and long-term numbness can occur. After removing the applicator, the treated area may appear red for a few hours. You may feel a dull sensation in the treated area that can last for several weeks after the procedure. Other changes may include deep itching, tingling, strong cramping, or muscle spasms. In rare cases, patients have experienced vasovagal symptoms during the treatment and reported freeze burn, darkened skin color, hardness, discrete nodules, or enlargement of the treatment area. Surgical intervention may be required to correct the enlargement. Treatment may cause new hernia formation or exacerbate pre-existing hernia, which may require surgical repair. Please also check our guidelines to follow after getting the CoolSculpting procedure.