Have those who have tried hairline procedures experienced any side effects?

Have those who have tried hairline procedures experienced any side effects?

If you receive treatment at a really good place, they say it looks so perfect and beautiful.

My scalp is quite sensitive, so I often get pimples and have a lot of dandruff.

I think it would be okay to just focus on that part, like the front and back hairline, when tying up my hair.

I'm still afraid of side effects and pain, so I can't bring myself to do it.

While doing eyeliner, I cried so much that I couldn't get a touch-up at all... It was too painful, haha.