Cyclothymia symptoms alternate between emotional highs and lows. The highs of cyclothymia include symptoms of an elevated mood (hypomanic symptoms). The lows consist of mild or moderate depressive symptoms. Cyclothymia symptoms are similar to those of bipolar I or II disorder, but they're less severe. When you have cyclothymia, you can typically function in your daily life, though not always well. The unpredictable nature of your mood shifts may significantly disrupt your life because you never know how you're going to feel. Hypomanic symptoms Signs and symptoms of the highs of cyclothymia may include: 
An exaggerated feeling of happiness or well-being (euphoria)
Extreme optimism
Inflated self-esteem
Talking more than usual
Poor judgment that can result in risky behavior or unwise choices
Racing thoughts
Irritable or agitated behavior
Excessive physical activity
Increased drive to perform or achieve goals (sexual, work related or social)
Decreased need for sleep
Tendency to be easily distracted
Inability to concentrate
 Depressive symptoms Signs and symptoms of the lows of cyclothymia may include: 
Feeling sad, hopeless or empty
Tearfulness
Irritability, especially in children and teenagers
Loss of interest in activities once considered enjoyable
Changes in weight
Feelings of worthlessness or guilt
Sleep problems
Restlessness
Fatigue or feeling slowed down
Problems concentrating
Thinking of death or suicide
