Will a urine routine test during menstruation be positive for occult blood

A urine routine test during menstruation may result in a positive occult blood test. Vaginal bleeding during menstruation may mix with urine samples, leading to false positive reactions. Positive occult blood in urine is usually related to urinary system diseases, menstrual pollution, and other factors. It is recommended to avoid re examination during menstruation.

During menstruation, when women undergo a urine routine examination, menstrual blood may contaminate the urine sample through vaginal secretions. The urine occult blood test strip is highly sensitive to hemoglobin, and even a small amount of blood mixed in can show a positive reaction. This situation belongs to physiological interference and is not related to kidney or urinary system diseases. Clinical advice is to recheck urine routine 3 days after the end of menstruation to rule out menstrual blood contamination factors. If the re examination result is still positive, further investigation of pathological factors such as urinary system stones, infections, or nephritis is needed.

Pathological factors should be monitored for urinary occult blood positivity that occurs during non menstrual periods. Urinary tract infections such as cystitis may lead to positive occult blood in urine, often accompanied by symptoms of frequent urination and urgency. In addition to positive occult blood, the urine of patients with glomerulonephritis may appear foam increase. The occult blood caused by urinary tract stones is often accompanied by lumbar and abdominal colic, which can be diagnosed clearly through B-ultrasound examination. In rare cases, urinary system tumors may also lead to persistent painless hematuria, which needs to be diagnosed through examinations such as cystoscopy.

It is recommended that women avoid the menstrual period and undergo a urine routine test within 3 days after menstruation. Before collecting urine samples, the external genitalia should be cleaned and midstream urine should be collected to reduce contamination. If urine occult blood test results repeatedly occur, timely medical attention should be sought to complete urine red blood cell morphology analysis, urinary system ultrasound and other examinations. In daily life, attention should be paid to keeping the perineum clean, drinking more than 2000 milliliters of water per day, and avoiding holding urine for a long time. When symptoms such as hematuria accompanied by fever and lower back pain occur, immediate medical attention should be sought.