I'm 15 years old and when I do press ups I hear a clicking noise coming from them, also when I do bench press

I use to do them when I was a little younger and didn't have this problem

*** Their is NO pain when it clicks ***

I've went like 5 months without doing them, came back to it and the clicking is still there.. I avoid doing it now because I don't want to risk an injury in the joint or lead to arthritis