BackgroundIf you've been on social media recently, you may have seen the rise of green light therapy for pain relief. While it may seem new in the migraine world, the effects of green light therapy are well-documented. According to Dr. Bing Liao, a neurologist at Houston Methodist Hospital, green light can change the level of serotonin and alter the endogenous opioid system, a pain-relieving system, throughout the central and peripheral nervous system, gastrointestinal tract, and immune syste...