Health / Arm Bone Experts?

I know this has happened since little, since i was like 10. Whenever I bend my right arm, my elbow cracks. it happens everytime, not sometimes. like if i just straighten my arm and bend it again (as you do), it cracks. whats wrong? it makes it hard for me to lift weigfhts.
BTW, its never painful, it just cracks. iom just worried
 
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