In a man's scrotum, there is a strip of tissue composed of vas deferens, arteries, and venous vessels on both sides, which is called the spermatic cord in medicine. The veins inside the spermatic cord are called spermatic veins.
Due to anatomical and structural characteristics, as well as various factors such as male physiological development, the spermatic veins are prone to blood stasis and expansion, forming worm-like venous masses, which are called varicocele.
When varicocele occurs, harmful substances produced by testicular metabolism cannot be discharged in a timely manner, and sufficient nutrients cannot be obtained. This can damage the normal function of testicular testosterone secretion, resulting in a decrease in testosterone secretion. Testosterone is the power to maintain male sexual function and produce sperm. If it is lacking, it will inevitably lead to male sexual dysfunction and infertility.
When varicocele occurs, about 50% to 80% of patients have abnormal semen examination, which manifests as low sperm count, low activity, and abnormal morphology. The causes of infertility caused by varicocele include: When varicocele occurs, blood stasis in the spermatic vein can cause an increase in the temperature of the scrotum, which can increase by 1 ℃ to 2 ℃. The temperature continues to increase for a long time, which can affect testicular sperm production, leading to azoospermia and oligospermia; At the same time, the high temperature environment in the epididymis is not conducive to sperm maturation.
In addition, sitting on soft chairs such as sofas for a long time can also easily cause varicocele, which can affect fertility. The original sitting posture of humans is based on two tubercles of the sitting bone as the support point. At this time, the scrotum is easily suspended between the two thighs. However, when sitting on a sofa or other soft chair, the original support point sinks, and the entire hip sinks into the sofa. The padding and surface materials of the sofa will surround and compress the scrotum. When the scrotum is compressed, venous reflux is impeded, and blood vessels near the testicles become thicker, "When blood stasis is severe, it can lead to varicocele, and patients may experience symptoms such as falling testicles, heavy weight, and dull pain in the lower abdomen.". At this time, due to blood stasis, increased pressure in the spermatic veins, and a lack of oxygen and nutrients, the clearance of metabolic products is affected, thereby affecting spermatogenesis and maturation.