These are some physical & physiological factors that stimulate dreams:
- The physical state of the body and the composition of the internal biochemistry.
- The deep desired wishes.
- Quality of sleep that allows deep dreams.
- Experiences of the dreamer.
- Medications or recreational drugs consumed.
- Illness or diseases.
- Presence of tiredness in the body.
- Heavy meal that requires the digestive tract to work or work for a longer time.