What is *acne vulgaris*?What are the main signs and symptoms of *acne vulgaris*?How is *acne vulgaris* diagnosed?What are some of the main medical treatments for *acne vulgaris*?Have any supplements been studied for *acne vulgaris*?How could diet affect *acne vulgaris*?Are there any other treatments for *acne vulgaris*?What causes *acne vulgaris*?Is *acne vulgaris* caused by dirty skin or poor hygiene?Does stress cause *acne vulgaris*?Is *acne vulgaris* an inherited condition?Is *acne vulgaris* contagious?Does eating certain foods make *acne vulgaris* worse?Does dairy cause acne?