CEFALY Technology is the maker of CEFALY, an FDA-cleared, over-the-counter wearable medical device that’s clinically proven to relieve migraine pain and reduce migraine frequency. Migraine is a complex neurological condition that causes intense headache pain, nausea and other symptoms in more than 1 billion people worldwide. Migraine is most often treated with medication, but many patients can’t tolerate side effects or find that medication doesn’t work for them.