everything clicks on me - knees, toes, fingers, shoulder, neck... so on..
started from various sources.. broken collar bone when fallen off sofa, sister smashing my hand in door, me smashing other hand on milk bottle, me smacking head on pavement numerous times... and then i turned age 2..
had a few car crashes since - they made some bits click..
but i have no idea why my nose clicks when I 'sniffle' or blow it...
and toes click because how often do you scrunch them up? the cartilage settles due to lack of use, not as flexible as it should be- then it clicks when your toe wiggles.. or something like that - might not be true, but it makes sense..