These text-book collections and full-text databases are great sources for background information on your topic. Some - especially MedlinePlus and UpToDate - contain excellent patient information handouts.
Cite the UpToDate topic as a chapter in a book titled UpToDate, with "Connor RF" (Rebecca Connor, MD, Senior Director of Clinical Content for UpToDate) always listed as the editor, published by Wolters Kluwer. Since an updated version of UpToDate is released on a continual, rolling basis, the date on which the topic was last accessed should be included. There are no page numbers to cite.
Kothari MJ. Carpal tunnel syndrome: Treatment and prognosis. In: Connor RF, ed. UpToDate. Wolters Kluwer; Updated February, 2025. Accessed March 3, 2025. https://www.uptodate.com/contents/carpal-tunnel-syndrome-treatment-and-prognosis?search=carpal%20tunnel%20syndrome&source=search_result&selectedTitle=1%7E139&usage_type=default&display_rank=1
