Chiropractic was founded in 1895 by Daniel David (D.D.) Palmer in Davenport, Iowa. Palmer, a magnetic healer, hypothesized that manual manipulation of the spine could cure disease. The first chiropractic patient of D.D. Palmer was Harvey Lillard, a worker in the building where Palmer's office was located. He claimed that he had severely reduced hearing for 17 years, which started soon following a "pop" in his spine. A few days following his adjustment, Lillard claimed his hearing was almost completely restored. Chiropractic competed with its predecessor osteopathy, another medical system based on magnetic healing and bonesetting; both systems were founded by charismatic midwesterners in opposition to the conventional medicine of the day, and both postulated that manipulation improved health. Although initially keeping chiropractic a family secret, in 1898 Palmer began teaching it to a few students at his new Palmer School of Chiropractic. One student, his son Bartlett Joshua (B.J.) Palmer, became committed to promoting chiropractic, took over the Palmer School in 1906, and rapidly expanded its enrollment.
Studies have not confirmed the effectiveness of prolotherapy or sclerotherapy for pain relief, used by some chiropractors, osteopaths, and medical doctors, to treat chronic back pain, the type of pain that may come on suddenly or gradually and lasts more than three months. The therapy involves injections such as sugar water or anesthetic in hopes of strengthening the ligaments in the back.