In hot weather, testicles hang lower due to the scrotum relaxing, which is a natural response to prevent overheating and protect sperm. This reaction, seen during heatwaves, affects sperm production temporarily. Varicoceles, enlarged veins in the scrotum, can exacerbate heat effects, leading to pooling blood which insulates testicles at a higher temperature. This may result in reduced fertility and increased discomfort. While heat can decrease sperm quality, the effects are generally not permanent, unless varicoceles are involved, which are common among men.
When it's a cold environment, the testicles move towards the body, and the scrotum tenses up. The opposite is true in a warm environment.
The scrotum acts like a thermostat, moving the testes closer to or further from the body to stop them overheating or getting too cold.
In warmer weather, the condition of varicoceles can become more pronounced and cause issues including reduced fertility, decreased testosterone and scrotal discomfort.
While warm weather can negatively affect sperm quality, the effects are usually temporary unless varicoceles are present.
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