1) Wearing black to bed will induce nightmares. ( I swear I get a nightmare everytime I wear black to sleep)

2) Eating right before bed.

3) Being on medication.

4) Being sick

5) Drinking coffee or ingesting any type of caffeine before bed.
Thanks!
1) I wear black to bed quite often I have black basketball shorts and a few black shirts I have worn to bed and have never had a nightmare from doing so.

2) Eating before bed does not effect my dreams very much only that I may wake up during the night or sleep better after doing so.

3) Medication can have a multitude of effects in the matters of sleep in dreams including making it harder to fall asleep, making it easier fall asleep, making you wake up more often during the night, making your dreams more vivid and clear, making your dreams less vivid and clear, and improving or worsening dream recall.

4) Being sick can have many of the same effects as number 3).

5) I always drink coffee before bed, but that's because I go to bed around 7:00 AM to around 2:00 PM. Around 7:00 AM I usually have coffee and go to bed a bit after and I can't say much on the matter of it effecting my dreams I can fall asleep easily and so from my experience it does nothing for my dreaming.