Curious about hairline concerns

My bangs have little volume and my forehead is very wide.

These days, there are many semi-permanent hairline procedures.

I'm 고민되는데, I wonder about the pain or the duration of maintenance.

Costs vary greatly; some places are extremely expensive. Is it due to the difference in hair dye?

Is it due to the difference in the maintenance period?

I want to try it once, but I want to hear genuine reviews.