Blood in Urine in Females: Causes and When to Seek Care

Blood in urine in females, also called hematuria, can happen because of a urinary infection, menstrual contamination, kidney stones, medicines, or less commonly a urinary tract cancer. Even when it is painless or occurs only once, a healthcare professional should assess it to confirm the source and decide whether testing is needed.

What blood in urine means for females

Blood in urine in females is called hematuria. It may be visible, making urine look pink, red, tea-colored or cola-colored, or microscopic, meaning red blood cells are found only when a laboratory examines a urine sample. The amount of blood seen does not reliably show how serious the cause is: a small amount may need investigation, while dramatic color changes can sometimes have a treatable explanation.

True urinary bleeding can come from the kidneys, ureters, bladder or urethra. In females, blood from menstruation, vaginal bleeding, a skin injury, or bleeding from the rectum may be mistaken for blood in urine. A properly collected urine test, often repeated when a person is not menstruating, helps clarify whether blood is actually coming from the urinary tract.

Many causes are not dangerous, particularly in younger people with symptoms of a urinary tract infection. However, painless visible blood in urine should never be assumed to be harmless. A clinician can consider a person’s age, symptoms, pregnancy status, smoking history, medicines and other health conditions to plan the right evaluation.

What it can look and feel like

Visible hematuria may color all of the urine or appear only at the beginning or end of urination. Sometimes there are small streaks of blood or clots. Urine can also appear reddish after foods such as beetroot or after certain medicines, but a urine test is needed to distinguish these color changes from actual blood.

Associated symptoms can offer useful clues. Burning during urination, needing to urinate often, urgency, lower abdominal discomfort or cloudy, strong-smelling urine may occur with a urinary tract infection. Severe pain in the side, back, lower abdomen or groin, sometimes with nausea, can occur when a kidney stone moves through the urinary tract.

Other people have no pain or urinary symptoms at all. Swelling, high blood pressure, foamy urine or reduced urine output can suggest a kidney-related cause and should be assessed. Blood in urine is not a diagnosis by itself; it is a sign that should be considered alongside the person’s full health history and examination.

Common causes and risk factors

Urinary tract infections are a frequent cause of blood in urine in females. Inflammation of the bladder or urethra can make the urinary lining bleed. Kidney infections may cause fever, chills, nausea and pain in the back or side, and require prompt medical treatment. Urinary tract infections can often be confirmed with urine testing.

Other possible causes include kidney or bladder stones, recent vigorous exercise, injury, urinary catheter use, kidney inflammation, inherited kidney conditions and enlarged blood vessels in the urinary tract. Some medicines, including blood-thinning medicines, can make bleeding more noticeable, although they do not remove the need to look for an underlying source.

Less commonly, blood in urine can be related to cancers of the bladder, kidney or urinary tract. Risk is higher with increasing age, tobacco exposure, certain occupational chemical exposures, previous pelvic radiation, long-term bladder irritation, and a history of urinary tract cancer. These factors do not mean cancer is present, but they make a complete assessment especially important.

• Menstrual or vaginal bleeding may contaminate a sample.
• Pregnancy can change the range of possible causes and should be disclosed promptly.
• A personal or family history of kidney disease may guide additional testing.
• Repeated infections or stones can increase the likelihood of recurrence.

How doctors find the source of bleeding

The evaluation starts with questions about the urine color, timing, pain, fever, recent exercise, periods, pregnancy, medicines and previous urinary problems. A clinician may also ask about smoking, family history, recent infections and symptoms elsewhere in the body. Physical examination may include checking blood pressure and gently examining the abdomen and back for tenderness.

A urinalysis checks for red blood cells, infection markers, protein and crystals. A urine culture may identify bacteria and help select treatment if infection is suspected. If menstruation or vaginal bleeding could affect the result, the clinician may ask for a repeat clean-catch sample after bleeding has stopped, or use another collection method when appropriate.

Blood tests may assess kidney function, inflammation or anemia. Depending on the findings and individual risk, imaging such as ultrasound or computed tomography may examine the kidneys and urinary tract for stones, obstruction or masses. Some people, particularly those with visible hematuria or higher-risk features, may need cystoscopy. During this outpatient procedure, a urologist uses a thin flexible camera to inspect the bladder and urethra.

Not every person needs every test. The investigation is tailored to whether hematuria is visible or microscopic, whether it persists, and the person’s age, symptoms and risk factors. If a first test is abnormal, follow-up is important even if the urine later looks normal.

Treatment, procedures and recovery

Treatment depends on the cause rather than on the presence of blood alone. A confirmed uncomplicated urinary infection may be treated with prescribed antibiotics, while a kidney infection needs timely medical review and closer monitoring. Drinking adequate fluids can support general urinary health for many people, but it is not a substitute for assessment or prescribed treatment.

Small kidney stones may pass with symptom relief, fluids when medically appropriate, and monitoring. Larger, persistent or obstructing stones may require a urologic procedure. Options can include kidney stone treatment to break, remove or bypass a stone, selected according to its size, location and the person’s health. Recovery varies by procedure, but mild urinary discomfort or a small amount of blood for a short time can occur after some urinary interventions.

If cystoscopy is recommended, it is commonly performed as a short outpatient examination. Some people experience mild burning on urination, urinary frequency, or lightly blood-tinged urine for a day or two afterward. Patients should follow their clinical team’s instructions about drinking fluids, activity, pain relief and when to report symptoms such as fever, worsening pain, heavy bleeding or difficulty passing urine.

When tests suggest a kidney condition, treatment may involve a nephrologist and focus on protecting kidney function and controlling the underlying disease. Acıbadem Health Point’s multidisciplinary specialists and JCI-accredited hospitals can assess urinary symptoms and coordinate diagnostic and treatment planning for international patients.

Practical self-care while awaiting assessment

Anyone who notices blood in urine should arrange medical advice rather than trying to diagnose the cause at home. It can help to note when the color change began, whether it happened more than once, and any accompanying symptoms such as pain, fever, burning, clots or changes in urinary frequency. This information can make the clinical assessment more efficient.

For a urine sample, careful collection matters. Unless instructed otherwise, a clean-catch midstream sample can reduce contamination: clean the genital area, begin urinating into the toilet, then collect urine midstream in the sterile container. If possible, avoid providing a routine sample during menstruation; if this cannot be avoided, tell the healthcare team.

People should not stop prescribed blood-thinning medicine or other essential medicines without speaking with the clinician who prescribed them. They should also avoid using leftover antibiotics, as this can delay an accurate diagnosis and may not treat the right cause. If an infection is being treated, completing the prescribed course and reporting persistent symptoms are important.

When to seek medical care

Visible blood in urine, blood found repeatedly on testing, or unexplained urine discoloration should be discussed with a doctor or qualified healthcare professional. This is particularly important when bleeding is painless, recurs, occurs after menopause, or is accompanied by weight loss, fatigue, persistent urinary symptoms or a history of smoking.

Urgent medical care is appropriate if there is heavy bleeding, blood clots, an inability to pass urine, severe abdominal, back or side pain, fever, chills, vomiting, dizziness, fainting, or a person feels seriously unwell. Pregnant people, children, and people with known kidney disease or a weakened immune system should seek advice promptly when blood is suspected in urine.

Most causes of hematuria can be investigated effectively, and many are treatable. Early evaluation provides reassurance when results are normal and helps ensure that infections, stones, kidney disease and other less common causes receive appropriate care without unnecessary delay.

Frequently asked questions