According to miraDry, the procedure has been performed over 140,000 times worldwide, and has been proven to be highly safe and effective. Following the procedure, patients will experience localized soreness and swelling in the treated area, which should dissipate within a 2-3 weeks. Some patients experience temporary, short-term changes in sensation, which may include tingling or numbness, in the skin of their underarms or upper arms, which also dissipates gradually over time.