Nocturnal Erection

What is Nocturnal Erection?

Spontaneous erections of the penis during sleep or on morning waking (nocturnal erection or a “morning glory”) are a common phenomenon in all men between puberty and old age (andropause). It may be a response to an erotic dream, but if it occurs on waking it is usually a reaction to an over full bladder.

Doctors investigating impotence will often ask about the presence of these erections as it can help to differentiate between impotence due to disease and impotence due to psychological factors.

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