hi, There can be a number of psychological triggers that cause nightmares in adults. For example, anxiety and depression can cause adult nightmares. Post-traumatic stress disorder (PTSD) also commonly causes people to experience chronic, recurrent nightmares. Nightmares in adults can be caused by certain sleep disorders. These include sleep apnea and restless leg syndrome. If no other cause can be determined, chronic nightmares may be a distinct sleep disorder. People who have relatives with nightmare disorder may be more likely to have the condition themselves. ortunately, there are steps you and your doctor can take to lessen the frequency of your nightmares and the effect they are having on your life. First, if your nightmares are the result of a particular medication, you may be able to change your dosage or prescription to eliminate this unwanted side effect. For people whose nightmares are caused by conditions such as sleep apnea or restless leg syndrome, treating the underlying disorder may help alleviate symptoms.If your nightmares aren t illness- or medication-related, don t despair. Behavioral changes have proven effective for 70% of adults who suffer from nightmares, including those caused by anxiety, depression, and PTSD. Remember to practice good sleep hygiene, which will help prevent the sleep deprivation that can bring on nightmares in adults. Make your bedroom a relaxing, tranquil place that is reserved for sleep and sex, so that you don t associate it with stressful activities. Also, be cautious about the use of alcohol, caffeine, and nicotine, which can remain in your system for more than 12 hours and often disrupt sleep patterns.thankyou.