Is she pulling her legs towards her stomach? Grunting? Passing gas often, or difficult to burp? Are you breastfeeding or formula-feeding?
If she is showing sign of gas discomfort and you are formula-feeding, try a different bottle. I was using Avent and switched to playtex-drop ins. Instant relief. Also had to switch to soy milk.
If Breastfeeding, look at your diet. Some food cause gas and tummyache.
Make sure you burp her in the middle of a feeding -and- after feeding. Make sure her clothes are not too tight, rough, or the tags are not irriating her. Try soothing music and swaying movement. My son was soothed by running tap water while rocking him. Swaddling might help if you haven't already tried that. Some babies have a "crying period" throughout the day. I would keep a journal of when the crying starts and stops, and what helped that time.
Warm bath might help. Pedaling her legs might help gas.
at 11:55 PM on Dec. 2, 2009