Persistent depressive disorder symptoms usually come and go over a period of years. The intensity of symptoms can change over time. But symptoms usually don't disappear for more than two months at a time. Also, major depression episodes may occur before or during persistent depressive disorder. Symptoms of persistent depressive disorder can cause major problems in your life and may include: 
Sadness, emptiness or feeling down.
Loss of interest in daily activities.
Tiredness and lack of energy.
Low self-esteem, self-criticism or feeling you're not capable.
Trouble focusing clearly and trouble making decisions.
Problems getting things done well and on time.
Quickly becoming annoyed, impatient or angry.
Avoidance of social activities.
Feelings of guilt and worries over the past.
Poor appetite or overeating.
Sleep problems.
Hopelessness.
 In children, symptoms of persistent depressive disorder may include depressed mood and being irritable, which means easily becoming annoyed, impatient or angry.