If someone has numbness in a region outside the treated area after CoolSculpting, this may be a temporary situation from nerve irritation. The distant area will not lose fat however. The skin may be numb distant to the area as the nerve that's irritated provides sensation to a wider area, but in order to lose fat, the exact area must be treated so the fat is frozen during the CoolSculpting. You need to discuss your symptoms with your doctor.
The information provided in Dr. Shelton's answer is for educational purposes only and is not intended to constitute medical advice. The information provided should not be relied upon as a substitute for consultations with a qualified health professional who may be familiar with your individual medical needs.