A 31-year old woman began suffering from psoriasis vulgaris at age 17. From the age of 10, she was treated with the following dental metals: gold, palladium, silver, copper and nickel. In 1994, she showed positive reactions in Lymphocyte Stimulation Test to house dust mite, nickel, silver, gold, palladium and titanium. All of the suspected causal dental metals were removed and changed to resins. Common bed linens were changed to mite-allergen-free bed linens. Marked improvement was dramatically obtained within three months.