I want mine done so badly. XD
I'm sorry I can't help you out all that much,
but from what I've heard about them,
it's like Jane (the.devil) said, it's a pinch,
and then it's like any other piercing -- it's sore.
It also might throb afterwards.
"All that we see or seem is but a dream within a dream." -E. A. P.
Since no one else has given a long ish reply i will write a more detailed reply :p
My tragus piercing is now 2 years old and fully healed, i had many problems with mine due to the jewellery i have in it.I would seriously advise you get it done with a needle and the jewellery is a bar.The bar will reduce the amount of movement and will make healing a lot easier and quicker.
when you get it done you will be asked to fill out a form, i am unsure if you have been to a professional piercer before.the area will be marked, you will be asked if the placment is okay.The piercer will show you that they are using clean needles and clamp your ear.The piercing is over very quickly.
i had mine pierced about a year and a half ago and its always been fine. it never bled or scabbed up or anything. It was never sore or swollen... it never hurt.
Maybe i was just lucky. but yus... mine was/is fine.