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Full-Service Chiropractor in O'Fallon, IL

If you’re been plagued by chronic back pain or experience excruciating migraines, let a chiropractor help you find relief through state of the art techniques that are non-invasive and pain-free. Located in O’Fallon, IL, Tri Force Chiropractic is the go-to resource for pain relief and improved quality of life. Specializing in complete chiropractic care, corrective exercises, nutritional advice, and massage therapy, this chiropractor delivers customized solutions tailored to your needs and lifestyle.   

Call Tri Force Chiropractic Today at 618-589-9400 to Schedule!
Chiropractic Service

Chiropractic Services

Receive gentle spinal correction, corrective exercises, massage therapy, and lifestyle advice from our team. We’re committed to providing effective, non-invasive chiropractic care, ensuring your pain is successfully managed and your wellness goals are met.


Relieve the chronic pain and discomfort of your TMJ with the assistance of an experienced chiropractor. We’ll help you find lasting pain relief, correcting the issue in partnership with your dentist. 

About Tri Force Chiropractic

Our approach involves an emphasis on educating our patients about what we’re doing so you can be fully informed about your health and the reasons behind our decisions. With the assistance of our lead chiropractor Dr. Eric Toennies and our team, you’ll be feeling like yourself again soon. Committed to treating the causes of pain instead of just the symptoms, we’re confident you’ll feel rejuvenated after every visit.     

Temporomandibular Joint Dysfunction (TMJD) is a collective term for a broad range of disorders that generally present as discomfort in the face, neck, and jaw. At Tri Force Chiropractic, we offer full-service treatment to help you feel better. We begin with an in-depth examination to form a comprehensive treatment plan to restore comfort. From administering safe adjustments and prescribing therapy and exercises to stabilize the neck and jaw, we’ll closely monitor your progress and adjust as needed.

As the most sought-after destination for complete chiropractic services in St. Clair County, Tri Force Chiropractic is committed to helping you find the relief you’ve been searching for. To schedule your initial consultation or to speak with a chiropractor about the many services available to you, call today. We look forward to assisting you however we can!   


Dr. Eric Toennies is not only treating in the Metro-East area, but is also from OFallon, IL. Dr. Toennies first started practicing overseas in Scotland before he came back to open his own practice. He has participated in mission trips around the world, some chiropractic and some not throughout his life. Dr. Toennies graduated with an B.A. in science from the University of Missouri at Columbia (GO TIGERS) in 2013. He then continued his education and received his Doctorate degree in 2016 from Logan University. During his time at Logan, he applied and was accepted into the program for internship at Scott Air Force Base. There Dr. Eric worked under Dr. Portwood for his last year in school. He uses his extensive training and wealth of experience to help people achieve amazing results through natural methods. Whether traveling, dealing with patients or coaching, Dr. Toennies loves to teach and help people understand biomechanics of the body. Not only does he help his patients but he is part of the local Kiwanis chapter in which he helps in various events to help raise money for kids in the area. His passion for helping people has brought him to this point in his life where chiropractic care can be provided to the people living throughout the Metro-East area.  

Call us Today at 618-589-9400


Dr. Eric Toennies is excellent at what he does! He has helped me tremendously with my running by getting treated and showing me stretches to do after. I highly recommend setting up an appointment today! His honesty and loyalty will choose the best treatment plan that fits right for you! Thank you for helping Dr. Eric!"
- Ashlyn Schleder
I visited Tri Force Chiropractic after meeting Dr. Eric Toennies at a local 5-K Run. After listening to me describe my symptoms, Dr. Toennies assured me he could help. I visited his office (admittedly with some skepticism), and not only did Eric help me, but he made it possible for me to go on a mission trip to Guatemala from which I recently returned. Not only would it have been difficult for me to go on the trip because of the back pain I was experiencing, it would have been impossible for me to do the work I did while. I did the work (hard manual labor) AND I did it pain-free. Thank you Dr. Toennies! Without you, my mission trip would have been impossible. I HIGHLY recommend Tri Force Chiropractic."
- Don Long
Eric goes above and beyond. He is very knowledgeable and makes sure to educate you as he works. Very easy to talk to and personable. He adjusted my 11 month old daughter as well, and I saw immediate change in her. I didn’t realize her hip was out of adjustment and she is crawling level now vs right hip higher than he left. I highly recommend this practice. He even followed up with me a week later to check in."
- Tiffani Radake