What causes human itching? and why does scratching that itch feel good?


Question:
I was just wondering what causes people to get an itch (i dont mean through rashes,insect bites etc) i just mean a random itch and why does it feel good to scratch it??

scratching without an itch dosen't feel good and can sometimes hurt yet with an itch it can be so good to just scratch that itchy area.

This is a serious question so if anyone knows the scientific reason then please let me know but if you just want to tell me your theory then go ahead

Thanks

Answers:
could be diabetics that is one cause they have for that. also it could be relaxing is tht is what is helped that.
Its all in our head..the itch is and the scratch just makes us feel good when nothing is wrong...lol wtf did i say..i dont know!
that's the question! i thought of this question when i wasn't on the computer then forgot it! has been bugging me for a while now! ooh i'll have to come back to this to see the answer!

p.s sorry i could help in answering myself!
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