Is it dangerous that my 3 year old has not had a good bowel movement in 6 days?

Impaction: Prolonged periods of time without a bowel movement (less than a week) are likely not dangerous for an otherwise healthy child, but can be quite uncomfortable and more difficult to address as more time passes. A glycerin suppository or Fleets enema are generally required at this stage to get things moving, followed by several weeks of stool softening, dietary modification and bowel retraining.