My DD is having this issue right now. We have tried everything. I even got into it with her daycare provider about her diet because we changed her diet at home. (we are taking her out of that daycare anyway) I took her to the doctor last Friday and she actually had a BM at the office and the doctor suggested some things we could do. The doctor did suggest Miralax but only 1-2 tsp in her juice or water. I was reading about this stuff and it doesn't seem safe using it for along time. Does anybody have any ideas or things you have used besides the prune juice, suppositories, etc. We changed her whole diet to eating no starches to only fruit, veggies and meat. Our doctor also recommended us to take her to a pediatric allergist and pediatric gastroenterologist if it comes to that.
Re: Constipation and holding BMs
If you decide to use castor oil, please start with a less amount and go up if you need.