When we sleep, external stimuli become part of our dreams. Our brain has the ability to incorporate “interference” into dreams to keep us asleep.

Therefore, there are several factors that affect your dreams and change your events and experiences in the dream world. what are they?

1. Votes
   Have you ever dreamed that your alarm clock is ringing? This dream can be caused by the sound from the alarm clock, and it shows how the sounds you actually hear can be integrated into the dream and influence the story we see while we sleep.
2. Smells
   German researchers studied the effect of external odors on dreams. They had REM sleep participants smell either a “good” smell (roses) or a “bad” smell (rotten eggs). Roses had a positive effect on participants’ dreams, while eggs had no effect.

Scientists explain that if we smell flowers or beautiful perfumes when we are awake, it is likely to cause positive feelings in us. So, the dream you see while you are sleeping follows the same pattern. There is also a biological explanation for this phenomenon, as the brain’s limbic system that regulates smell perception also controls emotions.

3. Position
   A recent study conducted in China showed that people who sleep face down more often have erotic dreams or dreams in which someone is chasing them.

The explanation is that when we sleep in this position, our reproductive organs come into contact with the bed, and hence, there is subsequent stimulation. At the same time, breathing is inhibited.

Related : Top 7 Secrets of Effective Liars to Help You Catch Them

Another surprising finding is that we tend to remember our dreams better when we maintain the same position after waking up.

4. Psychological state
   It is normal for your psychological state to affect your dreams. Depression, for example, seems to have an effect on the colors we see in our dreams. Dreams in black and white or shades of gray can be a sign of depression.

Besides colors, our psychological state affects the weather patterns in our dreams. Stress brings hurricanes, while mental calm brings sunny days.

5. Abstaining from something
   When we diet, we sometimes see delicious dishes and desserts while we sleep. When you abstain from something, whether it is food, cigarettes, or anything else, you are more likely to see it in your dreams.
6. Medicines and vitamins
   The medications you take affect your dreams in many different ways and interfere with REM sleep.

For example, nicotine patches often lead to vivid, life-like dreams. In addition, medications can also affect our ability to remember our dreams.