There are so many amazing things an esthetician can do for you, but they can't do everything. Below is a quick list of the most important things no esthetician can offer you unless they also have a medical license. Please note that estheticians are not qualified to handle severe inflammatory acne. While some cosmetic treatments may help with this condition, you must see a medical doctor for severe skin conditions.   ᐅ Diagnose Skin Conditions- Only a licensed medical professional can offer a medical diagnosis. You need a dermatologist or other specialist for this. ᐅ Perform any Non-Cosmetic Procedure- Estheticians' licenses are for cosmetic purposes only. ᐅ Prescribe Medications for Skin- Only licensed medical doctors (and possibly some nurse practitioners) can offer prescriptions. This is a different license in a different field.