Leakage of urine is not normal in 4+ months of pregnancy. The occurrence of urinary leakage in 4 months of pregnancy is usually considered clinically as possible tension incontinence caused by pelvic floor muscle dysfunction. This condition in pregnant women is often associated with an increase in abdominal pressure caused by an increase in fetal size, which can cause the pelvic floor muscles to be in a state of persistent tightness and relaxation, leading to pelvic floor muscle dysfunction. Coughing, sneezing, running and jumping may cause an increase in abdominal pressure, resulting in involuntary urinary leakage. If the symptoms are mild, it is recommended to perform pelvic muscle exercises under the guidance of a rehabilitation therapist to increase the tone of the pelvic floor muscles, such as Kegel exercises and anal lifting exercises.