Thank you for the input.
Constipation is often a problem in a child.
Children can pass stool every few days without any problem.
As she is having VSD, ASD, it is better to avoid straining.
Cow's milk can cause constipation due to lack of fibers.
Milk with oat meal can be tried to prevent the constipation.
Lactaid is not necessary.
Dietary measures usually help a lot.
Please try to give more water or fluid, high fiber containing food.
In many cases it has been seen that less water intake is related to constipation.
Vegetable like peas, beans, spinach, carrot, potato are very good fiber containing foods.
Cooked leafy vegetables are also good and should be given daily.
Instead of fruit juice, fresh fruits like peaches apricots, prunes, ,pears, plums etc. can be given and those would help to relieve constipation.
When you take food, let her sit with you.
She can try those & learn to take variety of foods.
Though she is 13 months old, still you can try to keep a routine to let your baby sit in the potty for 5-10 minutes 2-3 times a day to make a habit.
As the stool is hard to pass and she is pushing hard, you can give glycerin suppository for easy passage of stool.
Fibre containing laxative like metamucil/ citrucel can be given sometimes.
If the symptoms continue, you should take her to doctor.
I hope this information will be helpful.
If you have any query, please feel free to ask.
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Wish her healthy life.