Carbol-fuchsin is indicated for the treatment of “postoperative phenol nail procedures”. Besides, it may also be used as “a first aid antiseptic drying agent in skin conditions where there is too much moisture”. Bear in mind that telling your doctor about your allergies or about the other drugs that you’re using will help them determine if Carbol-fuchsin will be safe for you, considering there are certain medicines and certain health conditions that may affect the use of the treatment in question. According to drugs.com, Carbol-fuchsin solution should be applied one to three times a day. Plus, it should not be used for more than one week, unless the doctor tells you to do so. And if the skin problem does not improve in one week, contact your doctor immediately. Even though you may experience mild stinging, you should check with your doctor if this side effect becomes bothersome.