Trial on Vascular Inflammation in Atopic Dermatitis

Main inclusion Criteria: * Men or women * 18 years of age or older at time of consent. * For AD subjects only: Confirmed clinical diagnosis of active AD according to Hanifin and Rajka criteria, BSA, EASI and IGA. * For AD subjects only: Diagnosis of atopic dermatitis for at least 5 years. * Women of childbearing potential is willing to use effective contraceptive method. * Women of childbearing potential must have a negative urine pregnancy test. Main exclusion Criteria: * Has known cardiovascular arterial disease, a pacemaker, psoriasis, uncontrolled diabetes. * Presence of an unstable co-morbidity that could have an effect on vascular inflammation. * Heart rate restriction for patients with asthma or COPD. * Use of any topical medication for atopic dermatitis on the site to be biopsied. * Use of systemic treatments for atopic dermatitis. * Use of phototherapy, tanning booth or other ultraviolet light sources. * Use of biologics. * Use of experimental medications.