Morning wood is actually a misleading term, as men can have several erections during the night. It’s only when you wake up in the morning that you notice. The parasympathetic nervous system, which is active during periods of rest, is also responsible for stimulating erections. This system is very active while you sleep, and is why erections happen over night. Erections during sleep can occur at any age, and even occur in male fetuses in the womb.
Erectile dysfunction can be due to physical or emotional problems, and morning wood provides an important clue about penis health. If you’ve been under a lot of stress lately, you may notice some trouble getting an erection. If this is the case, the presence of morning wood is a great sign that there is nothing wrong with your body. Erections during sleep are not influenced by sex drive or emotions, so this can help spot erectile dysfunction that can be treated with stress relief or therapy.