Allergies are a condition involving the immune system. Many people confuse allergies with colds because their symptoms are quite similar.

According to the Anxiety and Depression Association of America, anxiety disorders affect 40 million adults in the United States each year. At least 1 in 5 people will experience chronic itching at some point in their lives. However, it is difficult to determine how many people suffer from anxiety-related itching, also known as psychogenic itching.