It is possible to hear popping or cracking sounds during chiropractic adjustments, especially when the spine is being manually adjusted. As the joints are adjusted, gas bubbles are typically released, which produces these sounds. Although the sounds may surprise or even bother some patients, they are usually harmless and are a common aspect of chiropractic treatment. Yet, other chiropractors might employ different methods like instrument-assisted adjustments or delicate mobilization that don’t make popping or cracking sounds.