The occasional nightmare is considered a dream that’s simply more frightening or upsetting. Nightmares tend to be caused by stress, anxiety, or sometimes as a reaction to certain medications.
Everything you need to know about dreaming and how to have a good night sleep.
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Dark and quiet room. Temperatures in the 60s to low 70s are considered best. Remove or turn off light sources like TVs, VCRs, and alarm clocks, and consider light blocking shades if you live in an urban area or sleep past sunrise. White noise machines or earplugs can be helpful for drowning out bothersome noise.