Url link in the frontend description of a custom field

The link you provided shows how to create a url custom field for the user to fill in a url. My question is about how to display a hyperlinked text in the frontend description of a custom field. For example, I have a custom field called “Health information” that needs the user to enter his current health information. I have a webpage that tells the user how he or she can describe that information. I would like to have a hyperlinked text in the frontend description of the “Health information” custom field. How do I create that hyperlinked text that links to a specific url.