The person daydreams is normal physiology phenomenon, everybody can daydream, now and then make the sense with without what real nightmare, but if often become nightmare, that is commonly with at ordinary times angst of mental insecurity, spirit and mental pressing muscularity are relative, such long position still are in active position with respect to the cerebral cell of the pallium in bringing about occurrence Morpheus process easily, can bring about so appear much dream, appear easily also become nightmare. Nightmare when dream is clearer, be personally on the scene, say to daydream so appear exceedingly scared, the typical consensual adrenalin system is unusual excitement when awaking, close to e.g. occurrence heart-throb, gas, give cold sweat to wait.
Nightmare often because of real reason, if day thinks of night somewhat somewhat dream, say to a few dispute, terrified, spirit is encountered to depress the issue of sexual element among the life so, become nightmare with respect to very can large possibility; Because of character reason, if have a word,be do not do guilty thing midnight to knock at ordinary times heart not Jing, say so often this kind haggles over every ounce, individual gain and loss, all the day depressed, the mood not easy, such disposition can appear unluckily this kind of nightmare; Because of medicaments reason, if resemble reserpine of a few depressor waiting a moment, long insomnious nightmare may appear after using.
Occurrence nightmare state should undertake the adjustment of habits and customs above all, by day when many somes of outdoors activity, loosen the mood, regular life, communicate with the person more, avoid state of mental insecurity angst, often do not see horror piece of and so on, can reduce the odds that becomes nightmare so.
Say like place of original poster circumstance, if becoming nightmare,call oneself without the person on the side of moment wake, deepen nightmare scene continuously, the individual thinks he can be slept lightly by nightmare, frighten an a suit sweat.
(the picture comes from a network)