Emotional instability can be developed by several causes such as deficiency of the chemicals serotonin and dopamine in the brain as well as from environmental causes such as grief, abuse, loss or abandonment. These can all lead to insomnia, fatigue, anxiety, mood swings, increased intensity of emotions (uncontrollable laughing or crying, or heightened irritability or temper), depression, very low self-esteem and even suicidal tendencies.
Many patients suffering from emotional instability tend to the use of alcohol and drugs. Patients with emotional instability can make quick decisions without thinking such as ending relationships.