There is a slightly more involved process that is good for things like battle sequences, which are numerous and involve certain stats you don't want otherwise displayed. You would create a variable called ISDISPLAY. On a link leading to a battle, you would set ISDISPLAY to 1. On a link ending a battle, you would set ISDISPLAY to 0.
Then, in your global page script you would input:
IF %ISDISPLAY = 1 THEN $PAGETEXT := $PAGETEXT + "<p>Your current health is: " + %HEALTH
Note: You may need to have the site's Rich Text Editor turned off to use the <p> HTML tag, which will create a separate paragraph for the health display text, rather than tacking onto the end of another paragraph.