try try TRY to get some syrup of figs into her. It works a dream.
If she's teeny tiny, try to gently "pinch" the poo through the skin to break it down (great job being a mum isn't it) - My Mum did this for my DS when he was a couple of weeks old and he managed to poo it out
Warm bath, tummy massage, bicycling her legs, how old is she?. Same prob with DD 14 months, Dr's resorted to precribing enema in the end, traumatic but effective Somethimes we put her on the potty, good position to help pooing. Hope she's better soon
When ds2 struggles like this I take off his nappy when he's straining and hold his legs in to his chest. A friend of mine was told to hold her son in a sitting position when he was straining. I also tend to give him a drink at the same time as the sucking action seems to help speed things up too.
Gosh, that reminds me so much of what we went through with our DD just recently. She was in absolute agony (. The only thing that worked in the end was glycerol suppositories - they do a childrens version. I'd say within 10 minutes of "insertion" we finally had RESULT!! She was sooooo relieved!!!