The main difference between the female urethra and vagina is that the urethra is directly above the vagina, with a relatively small urethral opening and a relatively large vaginal opening. The urethra is the organ of the urinary system through which urine is excreted. The vagina is an organ of the reproductive system and is the birth canal for sexual intercourse and delivery of the fetus. If there is discomfort such as frequent urination, urgency, pain, back pain, or fever, it usually represents the possibility of a disease such as a urinary tract infection. If there is itching of the vulva, burning sensation at the vaginal opening, pain during sexual intercourse, dryness, abnormal increase of leukorrhea, etc., it generally represents the occurrence of gynecological inflammation. Normally, you should pay attention to rest more, drink more water, urinate diligently, do not hold urine, eat more fresh vegetables and fruits, etc., to reduce the chance of urinary and reproductive system diseases.