Back Pain Center's website describes Dr. Aaron Welk's chiropractic practice with locations in O'Fallon, Wentzville, and Hannibal, Missouri. Services include chiropractic care (general, pregnancy, sports), therapeutic rehabilitation, massage therapy, myofascial release therapy, dry needling, vitamin IV therapy, pelvic floor and lymphedema work, diagnostic ultrasound, functional medicine, advanced skin care solutions, NormaTec recovery system, and sports physicals. Conditions treated include arthritis, auto accident injuries, back pain, headaches, neck pain, running injuries, pregnancy-related pain, sciatica, TMJ issues, and tendonitis. The IV therapy program is delivered by ALIVE nurses or nurse practitioners (Natalie or others) and emphasizes immediate nutrient bioavailability versus the ~15% absorption from oral supplements. The practice dispenses Thorne supplements.