The most common cause of solid yellow semen is that the semen is not completely liquefied. Normal semen liquefies completely in about 30 minutes after ejaculation. If it does not liquefy beyond this time and is jelly-like, consider semen not fully liquefied due to prostatitis or seminal vesiculitis. This condition can affect the motility of sperm and affect pregnancy preparation, so you must go to the hospital as soon as possible for treatment. Another reason why semen is yellow and solid is that you may not have sex for a long time and a lot of semen will come out when you have sex once and there will be yellow and solid inside. There is also a situation where there is inflammation in the genitourinary system, such as prostatitis and seminal vesiculitis, where there is a large amount of pus balls inside, so yellow solids can be seen with the naked eye.