I'm 18 and my back cracks a lot no pain it just cracks dose that mean anything?

See below: you need to do your passive exercises daily to loosen yourself up. Stop cracking the back or like when people do that with their digits the digits get thickened and stiff. Just do your passive stretching daily and avoid very heavy lifting repetively

Need more info: My advice is to consult with an osteopathic physician (D.O.) who is well trained to help you in this instance.

Small Cartilage chng: When changes occur in the cartilage of our facet (or back) joints such as small tears or when gases escape from inside the joint capsule in can "crack." Many people say this helps their back feel better especially if they have spasm. However,If you are feeling pain when your joints pop or crack, then you should seek a health care professional. It does not appear to be dangerous at all.