The nerves to the prostate come from the pelvic plexus, which includes sympathetic and parasympathetic nerves. Sympathetic excitation causes contraction of the smooth muscles of the prostate, seminal vesicles and ejaculatory ducts, prompting the discharge of semen. At the same time, sympathetic nerves cause contraction of the internal urethral sphincter and prostatic sphincter, but inhibit contraction of the detrusor muscle, causing closure of the urethra at the bladder neck and prostate, thus preventing the discharge of urine, while preventing the reflux of semen during ejaculation. The parasympathetic nerve mainly stimulates the secretion of prostatic alveoli to produce prostatic fluid, which is involved in the composition of seminal fluid. When the parasympathetic nerve is excited, the detrusor muscle contracts and the urethral sphincter and prostatic sphincter relax to facilitate urination. The most likely situation is that the size of the prostate gland is not very large on the ultrasound, which means that it is not the prostate enlargement that affects urination, so where is the problem? The most likely problem is in two areas, one is the contractile function of the prostate and the other is the contractile function of the bladder. And both of these areas are innervated by sympathetic and parasympathetic nerves. What is the principle of acupuncture for prostate treatment? Since the neurovascular bundle controlling the prostate and bladder is from the pelvic plexus all the way down, extending down through the outer wall of the rectum past the prostate and bladder, and finally to the dorsal plexus nerve in the spongy body. So using acupuncture needles with electricity, the needles are accurately pricked into the neurovascular plexus near the bladder and rectum to stimulate the bladder contraction and the neurovascular plexus in the outer wall of the rectum, thus allowing for blood supply and nerve nutrition to the prostate, which will also regulate the disorder of the vegetative nerves. This in turn will improve urinary function.