In this article. Body dysmorphic disorder (BDD) is a distinct mental disorder in which a person has symptoms of a medical illness, but the symptoms cannot be fully explained by an actual physical disorder. People with BDD are preoccupied with an imagined physical defect or a minor defect that others often cannot see.DD is a chronic (long-term) disorder that affects men and women equally. It usually begins during the teen years or early adulthood. The most common areas of concern for people with BDD include: 1  Skin imperfections: These include wrinkles, scars, acne, and blemishes.
Four standard time zones for the continental United States were introduced at noon on November 18, 1883, when the telegraph lines transmitted time signals to all major cities.
The conterminous United States is composed of four time zones-Eastern, Central, Mountain, and Pacific. Each county is assigned to one of the four time zones. The four time zones of the 48 conterminous United States (boundaries are indicated by the red line). County boundaries are shown in gray and state boundaries are dark blue. Most of Alaska is in the Alaskan Time Zone but a portion of the Aleutian Islands are in the Hawaii-Aleutian Time Zone.