As if equipped with X-ray vision and psychic abilities, dermatologists know an astonishing amount about your health after a single glance in your direction. In fact, even before learning your reason for visiting, a dermatologist likely has a few ideas about whatโ€™s going wrong and how you should be treated. Conditions you could be completely unaware of catch a dermatologistโ€™s trained eye the second you walk through the door.

โ€œI immediately notice the quality of the skin and hair, which gives me tremendous insight into the patientโ€™s diet and stress levels,โ€ says Whitney Bowe, MD, a board-certified Dermatologist in New York City.

The first thing theyโ€™ll notice is โ€œwhether the patient has a deep frown line. Typically, the skin is at the very least dehydrated, dull, and with a little bit of laxity. Itโ€™s a good reminder to use a medical-grade skin care line like NeoCutis, which has a number of active ingredients to help stimulate cell turnover and restore hydration to the skin,โ€ says Ava Shamban, MD, Beverly Hills Dermatologist and founder of SKINxFIVE.

โ€œThe next step would be to identify if the patient has acne or rosacea, and how many superficial line wrinkles versus deeper lines and wrinkles there are,โ€ Dr. Shamban adds. (Here are a few important things everyone needs to know about rosacea.)

However, beyond noting the strengths and shortcomings of your skin-care routine, your dermatologist can also tell a ton about your bodyโ€™s general well-being just by looking at your skin. โ€œThe skin is a window to our overall health. Not only can it show signs of an underlying medical condition (such as a thyroid issue, autoimmune disease, or even diabetes), it also reflects your overall diet, stress levels, and hormonal balance,โ€ Dr. Bowe says.