S.,
I understand what your going through, I have been dealing with this with my son for several months.
He holds back his poop even arching his back to clinch his butt cheeks..
I finally took him to see a GI Dr. She did a nine day cleaning out of him since she said he was really badly constipated. (Even though he was pooping every 2 days)...
So I had to do the following:
Day 1. Child Fleet Enema
Day 2. Suppository
Day 3. Miralax
follow for 9 days I am coming up to my 9th day soon.
He has been feeling much better. My son has been very very clingy towards everyone, Had no urge to go play since he was so uncomfortable.
I tried the Flax Seed and Probiotics and thought it was helping (Still will continue once he gets on a regular routine)
I also had blood work drawn for him in case he has some food allergies.
I got a call 1 day after his blood was drawn and he was very anemic, So started him on Iron drops (Take about constipation, sure will be now) and getting him retested next week for anemic...
My son is a very picky eater.. So hard for him to drink Juice, Eat specific foods.. He likes the same things.. We try everything.
The dr. is going to keep him on Miralax to get him regular and I hope that helps. I hate having him on medication but if it helps then I will do what I have to so my son will be ok and happy go lucky kid. He has been so playful and loving the last few days.. Wonderful to see that.
I think maybe talking to her dr to see if other things are going on.
I was at the last straw, I was so sad and upset that I may have done something to cause this, so I finally decided to take him to the GI dr, since they are specialist's in that area...
I needed to know I have done everything possible to help him.
I feel much better knowing he may be on his road to having normal bowel movements....
Good luck and let us know how it comes out.... :)