Psychological factors: and traumatic experiences, especially during childhood, can increase and lead to PTSD, stress and anxiety, depression can play into it. Biological Factors : Certain medications, particularly that suppress REM which deeply affect neurotraumatic levels that can cause nightmares. Socio-economic factors: Financial and housing Security can contribute to stress and anxiety, potentially increasing nightmares. Ages for nightmares are usually 3 to 6. After the age of 10, they tend to decrease. In teen years, girls have it more than boys, but adults still have it. Stretch this please