Foamy urine and thick liquid after ejaculation may be caused by physiological reasons, such as semen remaining in the urethra. It may also be due to pathological reasons, such as excessive urinary protein, urinary tract infection or high urine concentration. 1. Physiological reasons: because semen is ejected from the urethra, there will be a part of the remaining in the urethra, so after urination to the remaining semen out of the semen, semen are high in protein content of the liquid, so the formation of bubbles in the urine, this situation does not need to be too nervous. 2. Pathological causes: (1) excessive urinary protein: if the protein content in the urine is too much, there may be urine foam as well as viscous liquid when urinating. Urinary protein is mainly caused by various primary and secondary renal pathologies resulting in abnormal renal filtration function. (2) Urinary tract infection: If there are symptoms of urinary tract infection, there may be urine foam and sticky liquid when urinating. A variety of pathogens can invade the human body through different ways, involve the urinary tract and grow and multiply in it, leading to the occurrence of urinary tract infection. (3) High urine concentration: If the urine concentration is too high, the phenomenon of urine foam and sticky liquid may appear when urinating. High urine concentration may be caused by dehydration, excessive exercise and sweating. If physiological reasons are excluded, you should go to the hospital in time to avoid delaying your condition or triggering adverse reactions.