The actress's character Cindy Cunningham will face heartbreak in next week's episodes when her young daughter Holly (Lydia Waters) runs away. After police become involved, the situation appears more serious than first thought as officers discover Holly's schoolbag in a bin.
Speaking of the plot, Waring told PA: "I'm a mother myself so I have to put myself in that position and think how I'd feel how if it happened to me.
"Going there even a little bit made me break down completely. I can't even think about it."
The soap star, who welcomed daughter Mia in 2005, added: "Even when I'm watching stuff on TV involving kids being hurt I get a lump in my throat and have to give her a cuddle when she's asleep!"
Waring returned to Hollyoaks in 2008 following a break from the Channel 4 programme.