I’ve heard laser treatment is supposed to be the best, and leaves the least scars, as for pain…everyones pain threshold is different. Try stabbing yourself in the eye with a fork, if it hurts, you maybe sensitive to pain.
I had it done a few years ago, did the dot thingy on me nuckles and a cross on my arm, done them myself when I was young and stupid. Didnt hurt, no scars, go for it Sian