I recommend Dunsan-dong Elleshu Clinic.

Those of you who live in Daejeon are probably familiar with Dunsan-dong. Today, I'll introduce you to Yonsei Elleshu Clinic, located there. They offer a variety of treatments, including acne and freckles. I recently visited because I had some whiteheads growing on my face. The treatment cost wasn't as high as I expected, which was a nice bonus.