I would suggest an appointment with your pediatrician to discuss options for treatment. A good history and exam would first be in order in order to determine the best course.

Most of the time, pediatricians can treat chronic constipation and encopresis along with the gastroenterologist doctor, and to make sure no underlying cause for the chronic constipation.

See a pediatrician. The child should follow proper diet, to encourage having regular bowel movements.

Encopresis is when she cannot control her bowels. The most common reason is constipation and I see she has been on miralax. Is she taking it daily and having a soft bowel movement daily? If not, she may need to see Peds GI . You usually will need a bowel cleanout and high fiber diet and behavior training to go to potty .