7 doctors weighed in:

Is it bad to crack your neck or back? 

7 doctors weighed in
Dr. Robert Kwok
Pediatrics
3 doctors agree

In brief: Maybe not

Cracking a joint moves the parts of the joint, with the cracking noise coming from cartilage surfaces sliding, from movement of a little air-space from one place in the joint to another, or from some other non-traumatic event.
A person with no joint pains before or after cracking a joint is probably not damaging the joint. However, making it a frequent habit has uncertain long-term effects.

In brief: Maybe not

Cracking a joint moves the parts of the joint, with the cracking noise coming from cartilage surfaces sliding, from movement of a little air-space from one place in the joint to another, or from some other non-traumatic event.
A person with no joint pains before or after cracking a joint is probably not damaging the joint. However, making it a frequent habit has uncertain long-term effects.
Dr. Robert Kwok
Dr. Robert Kwok
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Dr. Keith Joe
Orthopedic Surgery
2 doctors agree

In brief: No

Just like popping a knuckle joint, you can crack your back or neck as well.
This generally shouldnt cause any problems.

In brief: No

Just like popping a knuckle joint, you can crack your back or neck as well.
This generally shouldnt cause any problems.
Dr. Keith Joe
Dr. Keith Joe
Thank
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