Why do knuckles crack?

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Tags

1. #lubricate
2. #bending
3. #bones
4. #negative
5. #caused
6. #joints
7. #cracking
8. #synovial
9. #stretching
10. #bursting
11. #knuckle
12. #backward
13. #bubbles
14. #fingers
15. #helps
16. #fluid
17. #chronic
18. #pressure
19. #reduced
20. #creating
21. #either
22. #strength
23. #cracked
24. #apart