Side aches from running

So, I have a client who has just started running. She's having troubles with side aches. I've recommended not eating within an hour of starting her run, making sure she's properly hydrating, paying attention to her breathing (try to inhale through nose and exhale through mouth) and take deep breaths rather than short ones. I can't think of anything else and they happen like 3 minutes in. I've been running since high school so I can't remember what it's like to be a beginning runner and having these problems, anyone have any other tips?