The yellow gel-like substance of semen may be a physiological phenomenon or a symptom of certain diseases, such as prostatitis, seminal vesiculitis, etc., and the cause should be identified in a timely manner. 1. physiological factors: due to irregular sexual life, the ejaculation interval is too long caused by the concentration of semen, may be yellow as well as jelly-like. 2. Pathologic factors: (1) Prostatitis may have an elevated white blood cell count, resulting in pus cells in the semen, which causes the semen to be yellow and jelly-like, accompanied by ejaculatory pain, abnormal odor and so on. (2) Spermatitis is a common infectious disease, acute and chronic, staphylococcus aureus, hemolytic streptococcus, E. coli is the main causative organisms, the disease may be manifested as yellow semen, ejaculatory pain, bloody semen, urination difficulties. There may also be other factors causing the disease, but this symptom alone is not enough to diagnose the disease. It is recommended that if physiological causes are ruled out, you should consult a doctor to clarify the cause of the disease and give targeted treatment.