I've had that up and down. It kind of felt like a fireball going up and down. It is heartburn, at least for me. Some foods can trigger heartburn or acid reflux, as the case may also be, and dairy can be a trigger. Talk to your doctor about her symptoms and ask if you think an antiacid may be in order. (I took zantac, but recently my acid reflux has gotten so bad that I need prevacid in the morning and zantac at night.)