Blood in urine appearance

Overview

Blood in urine (called hematuria) means there are red blood cells in your pee. It can make your urine look pink, red, or cola-colored. Sometimes you cannot see it with your eyes — a test finds it. Having blood in your urine is a sign that something is wrong in your urinary tract (kidneys, bladder, or the tubes that carry urine).

Yes, blood in urine is fairly common. Many people will have it at some point, especially after a bladder infection or kidney stone.

It can affect anyone at any age, but it becomes more common as you get older. People with a history of kidney stones, urinary infections, smoking, or certain jobs (like working with chemicals) have a higher chance.

Symptoms

Common symptoms

• Pink, red, or cola-colored urine
• Urine that looks normal but blood is found in a lab test (microscopic hematuria)
• Sometimes no other symptoms at all

Symptoms in children

• Blood in urine may be the only sign of a problem
• Could be from a urinary tract infection or, less often, a kidney condition called glomerulonephritis
• Sometimes a child may complain of belly pain or fever if there is an infection

Symptoms in older adults

• Blood in urine that comes and goes may be a sign of bladder or kidney cancer
• Older adults often have other causes like an enlarged prostate or bladder infections
• Frequent urination or pain when urinating may happen along with the blood

Causes

Main causes

• Urinary tract infection (UTI) — an infection in your bladder or kidneys
• Kidney stones — hard mineral deposits that can scratch the urinary tract
• Vigorous exercise — especially long-distance running or high-impact sports
• Enlarged prostate (in men) — can compress the urethra and cause bleeding
• Kidney disease — like glomerulonephritis (inflammation of the kidney filters)
• Trauma or injury to the kidneys or bladder
• Bladder or kidney cancer — more common in older adults, particularly those who smoke

Risk factors

• Age over 50
• Smoking or exposure to second-hand smoke
• Family history of kidney disease or bladder cancer
• Chronic urinary tract infections or stones
• Taking certain medicines like blood thinners (but do not stop them on your own)
• Working with chemicals linked to bladder cancer (like dyes or rubber)

When to see a doctor

See a doctor urgently if:

• You see blood in your urine and have a fever, chills, or pain in your side
• You have blood clots in your urine
• You cannot urinate or only a small amount comes out
• The blood is dark red or looks like cola

Book a routine appointment if:

• You notice a pink or red tint in your urine that goes away in a day or two
• Blood in urine is found during a routine check-up (microscopic)
• You have blood in urine without any other symptoms — still needs a doctor visit

Diagnosis

Your doctor will ask about your symptoms, medical history, and any medicines you take. They will also do or order tests to find the cause of the blood.

Tests that may be done

• Urine dipstick test — a quick test that shows blood in urine
• Urine sample analysis (urinalysis) — looks for red blood cells, infection, or other problems
• Blood test — to check kidney function and look for other clues
• Imaging tests like ultrasound, CT scan, or MRI to look at your kidneys and bladder
• Cystoscopy — a thin tube with a camera goes into your bladder to look for problems (done under local or general anaesthetic)

What to expect at your appointment

Most tests are painless and done in a clinic or hospital. The cystoscopy may feel uncomfortable, but you will be given medicine to help you relax or numb the area. Your doctor will explain each step and why it is needed.

Treatment

Treatment depends entirely on what is causing the blood in your urine. Your doctor will make a plan based on the cause. In many cases, once the cause is treated, the blood goes away.

Self-care at home

• Drink plenty of water — staying hydrated can help flush out minor irritants and stones
• Avoid things that can irritate your bladder, like caffeine, alcohol, and spicy foods, especially if you have an infection
• Rest if the blood started after vigorous exercise — it usually clears up on its own
• Do not take any over-the-counter pain medicines without asking your doctor — some can affect your kidneys or increase bleeding risk

Medical treatments

Your doctor may prescribe antibiotics for a urinary tract infection, or give you medicine to help pass kidney stones. If the cause is an enlarged prostate, medicines that relax the bladder or shrink the prostate may be used. For kidney disease, treatments focus on lowering blood pressure and protecting kidney function. If cancer is found, treatment options include surgery, local treatments inside the bladder, or other therapies — your specialist will discuss the best options for your situation.

When is surgery considered?

Surgery is rarely needed right away. It may be considered if kidney stones are too large to pass, for severe trauma, or if cancer is found. Your doctor will explain the options, risks, and benefits. You will have time to ask questions and decide.

Living with this condition

After finding blood in your urine, you may need follow-up tests to make sure it does not come back. Your doctor will tell you how often to check. Most people go back to normal activities once the cause is treated. If you are on antibiotics, finish the full course even if you feel better.

Lifestyle tips

• Drink enough water each day (about 6-8 glasses) to keep your urine light yellow
• If you smoke, try to quit — smoking is a major risk factor for bladder and kidney cancer
• Avoid holding your urine for long periods — empty your bladder when you feel the urge

Diet and exercise

Eat a balanced diet with plenty of vegetables, fruits, and whole grains. Reduce salt and processed foods to help your kidneys. Stay active, but if vigorous exercise caused the blood, check with your doctor before returning to that level of activity.

Mental health and emotional wellbeing

Seeing blood in your urine can be frightening. It is normal to feel worried or anxious. Remember that most causes are treatable. Talking with your doctor and understanding the plan can help you feel more in control. If anxiety lingers, ask your doctor about support.

Prevention

Not all cases can be prevented, but you can lower your risk. The best way is to avoid smoking, stay hydrated, and treat infections early. If you have risk factors, regular check-ups can catch problems early.

Vaccines

Vaccines do not directly prevent blood in urine. However, staying up to date on vaccines (like for the flu and pneumonia) can help you avoid infections that might stress your kidneys or bladder.

Screening programmes

Routine screening for blood in urine is not recommended for the general public. But if you have risk factors (like smoking or a family history of bladder cancer), your doctor may suggest occasional urine tests. Talk to your doctor about what is right for you.

Complications

If left untreated

• If blood is from an infection, it could spread to the kidneys and cause a serious kidney infection (pyelonephritis)
• Kidney stones may grow larger or block the flow of urine, leading to kidney damage
• If the cause is cancer, delaying treatment can allow it to grow and spread
• Chronic blood loss can lead to anemia (low red blood cells) and make you feel tired and weak

Long-term outlook

The outlook is very good for most causes of blood in urine. Infections and stones are almost always cured. Vigorous exercise will not cause lasting harm. Even when the cause is more serious, like cancer, catching it early often leads to effective treatment. Your doctor will work with you to manage the condition and keep you healthy.

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