Each child has different strengths, interest and temperamental styles. When a child is concentrating on one skill he will focus his energy on that skill and often regress in another area. When a child is focusing on his language skills for example and you rush him to focus on toilet learning, he can either follow or resist. Control is very important particularly to two and three year olds who will potty when they choose. When we push too hard, a child will tell us to slow down by regressing or pulling back to a more comfortable point.
Regression is a normal part of development .
A child also regresses if he pushes himself too fast. A child drives himself to succeed. Sometimes he pushes himself a little further than he is comfortable and needs to regress to an easier place. When a child is learning to potty his behavior can also regress. He may start fussing about things that ordinarily don't bother him.