The long stripes inside the semen may be caused by the non-liquefaction of sperm due to prostatitis, epididymitis, seminal vesiculitis and other reasons. 1. Prostatitis: Prostatitis is usually caused by pathogen infection, urinary tract infection, etc. It may have symptoms such as painful urination and urgency to urinate, which may also lead to sperm not liquefied, triggering the symptom of long streaks inside the semen. 2. Epididymitis: Epididymitis may be caused by bacterial infection, abnormal immune function, etc. It usually results in swelling of the scrotum. Pain and other symptoms, may also cause semen not liquefied, resulting in semen inside the symptoms of long stripes of things. 3. Vesiculitis: Vesiculitis is usually caused by urinary tract infection, lymphatic infection and other factors, there may be symptoms such as bloody semen, painful discharge of semen, and may also lead to semen non-liquefaction, resulting in the symptom of long streaks of something inside the semen. Patients should consult a doctor in time to identify the cause of the disease and carry out reasonable treatment with the help of the doctor.