Clitoris..?!
Question: Is it possible to masturbate so much that your clitoris has no sensation anymore?
Answers: Is it possible to masturbate so much that your clitoris has no sensation anymore?
Yes - and it can also become very irritated.
When you do masturbate, try using some form of sexual lubrication (or your own saliva), and lighten up on the touch. Be sure not to have nails that are sharp - you could end up with a few unpleasant scratches if you get carried away.
Yes, it's because of irritation. You need to pause for some time, for the situation to return to normal.