What is the ruling on working on designs for a dermatology and laser clinic that offers medical and cosmetic services, and is the salary earned from this work permissible?

The basic rule is that it is permissible to design advertisements unless they are for something forbidden, or something that is predominantly forbidden.

Regarding dermatology clinics, many of their services are only permissible out of necessity to remove a defect, not to seek beauty. It is well-known that clinics offer these services without distinction.

Judging the activity of these clinics requires knowledge of their reality. It is more prudent to avoid advertising for such clinics. If the advertisement is forbidden, then the money earned from it is forbidden, and the portion of an employee's salary corresponding to the forbidden work is also forbidden.