Pervasive developmental disorders (PDD) are a group of conditions that affect average development. The term "autistic spectrum disorder" now replaces PDD. Learn more.

Symptoms of PDD include a sad mood, fatigue, lack of concentration, low self-esteem, trouble sleeping, and lack of appetite or overeating.

A continuous feeling of sadness could be just a dark mood, or it could be Persistent Depressive Disorder that lasts for a long period of time. Ivanhoe explains the symptoms and treatment options.

Key points Persistent depressive disorder is a serious but relatively unknown form of depression. Understanding the signs and symptoms of PDD is the first step to seeking treatment. There are ...

Symptoms of PDD include a sad mood, fatigue, lack of concentration, low self-esteem, trouble sleeping, and lack of appetite or overeating. “We’re looking at your changes in mood from day-to-day.

Experts say symptoms of PDD include a sad mood, fatigue, lack of concentration, low self-esteem, trouble sleeping and lack of appetite or overeating. “We’re looking at your changes in mood ...