Quiz: Do You Know These Key Facts About Psoriasis? Question Title 1. Psoriasis affects 14 percent of the world’s population. True False Question Title 2. The plaques that form on the skin of people with psoriasis occur due to excess growth of skin cells. True False Question Title 3. Psoriasis can create inflammation elsewhere in the skin beyond the epidermal layer. True False Question Title 4. Topical therapy is not an option for people with psoriasis. True False Question Title 5. There is not yet a cure for psoriasis. True False Next