Normal: not to worry about it. You're hearing an articulatory sound (joine moving) similar to 'cracking your knuckles'. If it's painful, see your pediatrician.
Answered 6/20/2015
2.7k views
NP: If it is not bothering you, I would not worry. If you are doing something to make it pop, stop doing that.
Answered 6/20/2015
2.7k views
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