Nerivio is a LIFE-CHANGER!! My daughter had one migraine that lasted over a year and a half. She tried everything even up to 7 medications a day to try to control it and nothing ever did. The migraine never went below a level 6 and averaged around a level 8 but never went away. She used Nerivio once and the migraine went to a 3. She used it a second time and the migraine was completely gone. She used it a couple times a week over the next month and by the second month was done to using the machine once a week with no other medications needed. She has been mostly migraine free for the last 4 months. We were told by doctors when she was 15 years old that she would suffer with this migraine until menopause. I cannot sing praise high enough for Nerivio!! I want to kiss the inventors!!