Please recommend a dermatologist for acne treatment.

I had a lot of acne during my adolescence.

It has almost disappeared since I became an adult.

However, I get small pimples under my chin.

It spreads sideways from one place.

Went to the dermatologist and received acne treatment for 50,000 won per session.

I also received injections for small acne.

It doesn't seem to improve.

Please recommend a dermatologist.