AD is typically diagnosed clinically, meaning it is based on signs and symptoms alone, without special testing. Several different criteria developed for research have also been validated to aid in diagnosis. Of these, the UK Diagnostic Criteria, based on the work of Hanifin and Rajka, has been the most widely validated. +UK diagnostic criteria People must have itchy skin, or evidence of rubbing or scratching, plus three or more of: Skin creases are involved - flexural<unk>  of fronts of ankles, antecubital fossae, popliteal fossae, skin around eyes, or neck, (or cheeks for children under 10) History of asthma or allergic rhinitis (or family history of these conditions if patient is a child ≤4 years old) Symptoms began before age 2 (can only be applied to patients ≥4 years old) History of dry skin (within the past year)<unk>  is visible on flexural surfaces (patients ≥age 4) or on the cheeks, forehead, and extensor surfaces (patients<age 4)
medical cause of Dermatitis
symptom of Psoriasis
symptom of Rosacea
medical cause of Dermatophytosis
symptom of Herpes labialis
symptom of Stevens–Johnson syndrome
symptom of Epidermolysis bullosa
medical cause of Stye