Can you identify the condition in the photo on the left?  The chronic pruritic skin disorder is often associated with a personal or family history of asthma, hay fever, allergic rhinitis and eczema. Most cases first become apparent in early childhood. The hallmark of the condition is severe pruritus. Incessant scratching leads to lichenification. Over time, the disease tends to localize to the hands, posterior neck and the antecubital and popliteal fossae. Aggravating factors include cold weather, harsh soaps and detergents, and wool clothing. Which of the following is your diagnosis? a) Nummular dermatitis b) Allergic contact dermatitis c) Erythrasma d) Atopic dermatitis e) Pitted keratolysis Please leave your answer in the comment section below. I will share the answer in the next couple of days on Facebook and Twitter, and at the end of my next blog. Editor’s note: This blog is adapted from the handbook, Skin Disease Of The Lower Extremities: A Photographic Guide, from Tracey Vlahovic, DPM, and Stephen M. Schleicher, MD. The book is available for purchase at www.lowerextremityderm.com  . The e-book version is available for purchase at http://tinyurl.com/7itt66v  , http://tinyurl.com/7j44vez  and http://tinyurl.com/couepf5  .