While you may be more familiar with ultrasound in the context of diagnostic and pregnancy imaging, chiropractors and physical therapists use ultrasound units for pain treatment; different ultrasound techniques exist for different conditions. Chiropractic ultrasound therapy usually deals with back and neck pain, muscle strains, and arthritis. Moreover, physical exercises meant to increase mobility and range of motion can lead to sore muscles. Generally, ultrasound therapy in a chiropractic setting supports the body's natural healing capabilities and reduces muscle soreness.