The skin is your body’s largest organ so changes in your hair, skin or nails can be a sign that something is going on beneath the surface. While problematic skin could simply mean that you need to alter your beauty routine, your skin’s condition could also be the tell-tale sign of an underlying medical condition, says Dr. Jillian Macdonald, a dermatologist with The Ottawa Clinic and an associate professor in dermatology at the University of Ottawa.Chronically dry skin is commonly caused by two things: eczema and general dryness or climate,” says Dr. Macdonald. Eczema, a chronic inflammatory skin condition, can cause dry, itchy, inflamed and cracked skin. It has immunological, genetic and environmental components and is also related to asthma and hay fever.Breakouts in these areas could signal a possible hormone imbalance. This kind of adult acne is very common in women who may not have had acne as teenagers, explains Dr. Macdonald. But don’t worry or you could exacerbate the problem. Keep in mind that hormonal acne in women can get worse in times of stress, during your period or during menopause.Unwanted hair that’s sprouting up in classic male areas, such as around the chin or just below your bellybutton, could be a sign of polycystic ovarian syndrome (PCOS), says Dr. Macdonald. But, genetics and hormones also play a role in hair growth. If you’re concerned or exhibiting other symptoms of PCOS (such as an inability to lose weiDark undereyes can be a combination of genetics, age or lifestyle factors. Anatomically as you age, the fat pads and structural support around your eyes changes so you can see more of the hollows, says Dr. Macdonald. Dark skin under your eyes can also be caused by a nutrient deficiency, a lack of hydration or not getting enough sleep.ght despite diet and exercise or irregular periods), consult a doctor to rule out PCOS.Freckles and dark spots are “a measure of your lifelong sun damage,” says Dr. Macdonald. Most sun damage occurs during childhood and teen years and can increase your risk for skin cancer. Keep an eye on any changes in your skin from moles to raised lesions or sores that won’t heal.