Uterine fluid up to 5mm is a small amount, usually there is a small amount of fluid in the uterine cavity may be normal physiological phenomenon. Usually there will be a small amount of fluid in the uterine cavity, may be physiological uterine fluid, usually the amount of fluid is within 5mm. Most of the symptoms of physiologic fluid in the uterine cavity are mild or asymptomatic, and usually do not require treatment. Normally, there is a small amount of physiologic fluid in the uterine cavity, but once it exceeds the normal amount, the corresponding symptoms may appear as follows: abdominal distension, fever, irregular vaginal bleeding, leukorrhea, and lower back pain and so on. Generally speaking, 5mm of fluid in the uterus is a small amount, and if it is larger than 5mm, it may be a pathologic fluid in the uterus, and its harm is clearer, which may cause intrauterine infections, etc., and it needs to be standardized diagnosis and treatment. If you find a significant increase in the amount of fluid in the uterine cavity, you should consult a doctor in time, follow the doctor’s instructions to deal with the treatment, early detection, early diagnosis, do not miss the best time for treatment.