Redness in urination during 5 months pregnancy may be caused by urinary tract infection, gynecological inflammation, preeclampsia and other reasons. 1. Urinary tract infection: 5 months pregnant women see red when urinating, may be due to urinary tract infection, pregnant women are also often accompanied by frequent urination, urinary urgency, urinary pain and other uncomfortable symptoms. 2. Gynecological inflammation: the hormone level changes during pregnancy, easy to occur gynecological inflammatory diseases such as vaginitis, vaginal mucosa can be stimulated in the inflammation of the breakage, the appearance of red urine, usually accompanied by perineal itching symptoms. 3. Pre-eclampsia: If the blood comes out of the vagina and the pregnant woman has abdominal pain, she may have pre-eclampsia. Redness in urine during 5 months of pregnancy can also be caused by urinary tract stones. If a woman has the above situation, it is recommended to consult a doctor in a timely manner, under the guidance of the doctor, improve the relevant examination, clarify the cause of the disease, and symptomatic treatment.