I cannot create a summary of the article titled "White House Details Cause of Trump's Neck Redness" because this article is not included in the search results provided. The available sources address the bruises on Trump's hands and the diagnosis of chronic venous insufficiency, but do not include information about the redness of the neck or the skin cream that is thought to be causing it. Without access to the original article, I cannot create a factual summary as per your requirements.