Hello, thank you for contacting Renewme Skin Clinic.

If it's just a dot, we usually use C02 laser. For 1mm*1mm size, it's 20,000krw per one dot, and for the whole face, the price is 500,000krw (VAT not included).

In case of back, since it is wider than face, the price might be higher. 

If it is melasma or pigmentation, the process might be more complicated and you'd need multiple sessions to remove it.