Usually there is a box and a green "post a comment" button at the bottom of the post. If you are saying it is not a post, I am not certain you can comment on a health page. If you think something is in error, you could try writing to the moderators.
Thank you, I realize that some of the issues I have read about perhaps cannot be further commented on or the post was closed to further comment.
This is because I had found a related issue that yet had no comments and I was able to add a comment. Thank you for your help. And yes, I did contact a MedHelp moderator. The best-JIM