Recurring dreams are dreams that re-appear with some pattern of regularity. 

Studies suggest that recurring dreams may contain more threatening content than regular dreams. Research suggests links between recurring dream...

In lucid dreams, the dreamer is aware of the fact that he or she is dreaming, and often can manipulate or control the dream as it unfolds. 

Studies have found that lucid dreamers displayed significantly higher brain wave...

Daily life experiences don’t always present themselves in dreams immediately. Sometimes an experience from life will filter through to a dream after several days or even a week. This delay is what’s known as dream lag. 

Another function of dreaming appears to be processing and coming to terms with traumatic events. Grief, fear, loss, abandonment, even physical pain are all emotions and experiences that often replay themselves in dreams.