Patient's question:
Great, deep sleep for about 10 hours, bowel movement once every two days, weight: 40 jin, take a nap in the evening. What kind of assistance is needed: A 6-year-old boy gets an erection during his nap at night, but not during the day...Doctor's answer:
Okay, here is the translation, following your instructions:Regarding the structure of the penis, it turns out that the penis is composed of two pairs of corpora cavernosa and one corpus spongiosum, all surrounded by fascia and skin. As everyone knows, sponges absorb water on their own to become fully engorged when they come into contact with it; the corpora cavernosa within the male body work the same way. The difference is that within the corpora cavernosa, there is also a small duct, the cavernous artery, which is the final small branch of the internal pudendal artery and is normally in a contracted state. However, after being stimulated, it relaxes and dilates rapidly, quickly filling with blood and injecting it into the corpora cavernosa, until the pressure rises to a certain level and then stops. At this point, the engorged corpora cavernosa push the penis upright, which is what constitutes an erection. Erections can be divided into physiological erections and reflexive erections. The former is induced by the excitement of the erection center due to indirect stimulation of the cerebral cortex, such as sexual arousal triggered by olfactory, sensory, visual stimuli, or mental arousal. The latter is directly induced by stimulation of the penis, exciting the erection center. Regardless of which type of erection it is, it is completed by the dilation of the penile blood vessels, triggered by nerve impulses. This is also the type of erection phenomenon commonly seen in daily life; it is a physiological phenomenon. There is no need to worry too much.