With properly used techniques and keeping in mind the situations when it is contraindicated it cannot cause any damages. According to the Hungarian law manual therapy can be done only by skilled physician or manual therapist. It means completion of a special 2-year long course (accredited by Semmelweiss University) and afterwards an authorization from the Hungarian authority. According to the law spinal manipulation can be carried out only by physician. For your safety it is essential to treat your spine only by a skilled and authorized professional.