What Is Cystitis? Symptoms, Causes, Treatment and Recurrent Cystitis

Created: 27.09.2024 · Last Updated: 11.08.2026 · Category: Urology · Prepared by the Academic Hospital Web and Editorial Board.

Cystitis means inflammation of the bladder. In everyday clinical use, the term commonly refers to a bacterial lower urinary tract infection affecting the bladder.

Bacterial cystitis most often develops when bacteria normally found in the bowel, particularly Escherichia coli (E. coli), reach the urethra and travel into the bladder.

Bladder infections are more common in women, partly because the female urethra is shorter.

Not all cystitis is caused by bacterial infection. Interstitial cystitis/bladder pain syndrome, radiation-related inflammation and some medication-related conditions can produce bladder symptoms without a typical bacterial UTI.

What Is Cystitis?

Current urinary-tract infection classification describes cystitis as a localised UTI confined to the bladder without signs of systemic infection.

Typical symptoms include:

  • Burning, stinging or pain when urinating
  • Frequent urination
  • Urgency
  • Passing small amounts of urine
  • Lower abdominal or bladder pressure

Fever, rigors, flank pain or marked systemic illness are not typical features of simple cystitis.

What Are the Symptoms of Cystitis?

  • Burning or pain during urination
  • Frequent urination
  • A sudden strong urge to urinate
  • Passing small volumes of urine
  • Lower abdominal discomfort or pressure
  • Cloudy urine
  • Blood in the urine
  • A change in urine odour

Cloudy or strong-smelling urine alone is not sufficient to diagnose cystitis.

Is Fever a Symptom of Cystitis?

High fever is not a typical feature of simple cystitis.

Symptoms suggesting a systemic or upper urinary tract infection include:

  • Fever
  • Rigors or shaking chills
  • Flank, side or back pain
  • Nausea and vomiting
  • Marked malaise
  • Low blood pressure or clinical deterioration

Urinary symptoms accompanied by fever and flank pain require assessment for pyelonephritis, or kidney infection. Kidney infection requires a different clinical approach from localised cystitis.

What Causes Cystitis?

Bacterial cystitis usually occurs when bacteria from the person's own bowel flora reach the urethra and ascend into the bladder.

E. coli is the most common cause, although other organisms can also cause urinary infection.

Factors associated with an increased risk can include:

  • Sexual intercourse
  • A new sexual partner
  • Spermicide use
  • Previous cystitis
  • Postmenopausal changes
  • Incomplete bladder emptying
  • Urinary stones or obstruction
  • Urinary catheters or recent instrumentation
  • Certain anatomical or functional urinary-tract abnormalities
  • Diabetes or conditions affecting immune function

Is Cystitis Contagious?

Typical bacterial cystitis is not considered an infection that spreads from one person to another.

It usually develops when bacteria from the person's own bowel flora enter the urinary tract and reach the bladder.

What Are the Risk Factors for Cystitis?

Female Anatomy

The female urethra is shorter than the male urethra, making it easier for bacteria to reach the bladder.

Sexual Activity

Sexual intercourse may move bacteria towards the urethra and is an important trigger in some women with recurrent cystitis.

Spermicides

Spermicide-containing contraception is associated with an increased risk of recurrent cystitis.

Menopause

Changes in oestrogen levels, vaginal tissue and vaginal flora after menopause can increase susceptibility to recurrent urinary infection.

Incomplete Bladder Emptying

Significant residual urine can increase the likelihood of bacterial growth and recurrent infection.

How Is Cystitis Diagnosed?

In women without additional risk factors, acute cystitis can often be diagnosed with high probability from typical lower urinary tract symptoms.

A typical presentation includes:

  • New dysuria
  • Frequency
  • Urgency
  • No significant vaginal discharge or irritation

Urine dipstick or urinalysis may be used to support the diagnosis.

Extensive laboratory testing or imaging is not required for every typical episode.

When Is a Urine Culture Needed?

A urine culture can identify the causative organism and help determine antimicrobial susceptibility.

Culture is particularly useful when:

  • Systemic UTI or pyelonephritis is suspected
  • Symptoms are atypical
  • Symptoms do not improve with appropriate treatment
  • Symptoms recur soon after treatment
  • Recurrent cystitis is being evaluated
  • There is a high risk of antimicrobial-resistant organisms
  • The patient is pregnant

Routine post-treatment urine testing is generally unnecessary when symptoms have completely resolved.

Are Ultrasound or Cystoscopy Needed for Cystitis?

Ultrasound and cystoscopy are not routine tests for a straightforward episode of cystitis.

Further investigation may be appropriate when there is concern about:

  • Kidney or bladder stones
  • Urinary obstruction
  • Incomplete bladder emptying
  • Persistent unexplained haematuria
  • Atypical recurrent infections
  • Interstitial cystitis/bladder pain syndrome
  • Another bladder or urothelial disorder
Not everyone with recurrent cystitis needs cystoscopy. Routine extensive imaging or cystoscopy has a low diagnostic yield in patients without risk factors or atypical features.

How Is Cystitis Treated?

Treatment of bacterial cystitis depends on factors including age, pregnancy, kidney function, allergies, previous antibiotic exposure, local resistance patterns and urine-culture results when available.

Several evidence-based antimicrobial options are available for acute cystitis, but the appropriate antibiotic should be selected for the individual patient.

Supportive measures can include:

  • Adequate fluid intake
  • Avoiding prolonged delay in urination
  • Appropriate pain relief when required

Do not automatically restart an old antibiotic prescription whenever cystitis symptoms recur. Inappropriate antibiotic use can contribute to treatment failure, adverse effects and antimicrobial resistance.

Does Bacteria in the Urine Always Require Antibiotics?

No. Bacterial growth in urine without urinary symptoms may represent asymptomatic bacteriuria.

Asymptomatic bacteriuria is not treated in most people. Pregnancy and certain urological procedures that breach the urinary mucosa are important exceptions.

What Is Recurrent Cystitis?

Recurrent cystitis is defined as:

  • At least 2 episodes within 6 months
  • or at least 3 episodes within 12 months

The diagnosis should be confirmed with urine culture.

Potential contributing factors include sexual intercourse, spermicide use, menopause, incomplete bladder emptying, urinary stones and other urological abnormalities.

How Can Recurrent Cystitis Be Prevented?

Adequate Fluid Intake

Increasing water intake can reduce recurrent episodes in premenopausal women who normally drink relatively small volumes of fluid.

People with heart failure, kidney disease or another condition requiring fluid restriction should discuss fluid intake with their clinician.

Avoid Prolonged Delayed Urination

Regular bladder emptying and avoiding habitual prolonged delay in urination may be helpful.

Urination After Sex

Postcoital urination is commonly advised and is a low-risk practice, although evidence that it definitively prevents recurrent cystitis is limited.

Review Spermicide Use

Alternative contraception can be discussed when recurrent cystitis occurs in someone using spermicides.

Avoid Excessive Genital Cleansing

Vaginal douching and frequent use of antiseptic or irritating genital products are not preventive and can disrupt the normal mucosa and flora.

Recurrent Cystitis After Menopause

Postmenopausal changes in the vaginal tissue and microbiome can contribute to recurrent urinary infection.

For appropriate postmenopausal women with recurrent cystitis, local vaginal oestrogen is an evidence-based preventive option.

Suitability should be assessed according to medical history and individual clinical circumstances.

Do Cranberry and D-Mannose Prevent Recurrent Cystitis?

Cranberry

Evidence for cranberry products remains mixed. Some studies suggest fewer recurrent episodes, while others have not demonstrated a clear benefit.

There is no universally established product, dose or duration.

D-Mannose

Evidence for D-mannose is also weak and conflicting.

Some earlier studies suggested benefit, but a more recent placebo-controlled trial did not demonstrate a significant reduction in recurrent medically attended cystitis.

Methenamine Hippurate

In some women without significant urinary-tract abnormalities, methenamine hippurate can be considered as an alternative to daily antibiotic prophylaxis.

Suitability should be assessed by a clinician.

Antibiotic Prophylaxis

When recurrent infections continue despite non-antibiotic preventive strategies, selected patients may be considered for continuous low-dose or postcoital antibiotic prophylaxis.

The benefits must be balanced against adverse effects and antimicrobial resistance.

Is Cystitis Sexually Transmitted?

Typical bacterial cystitis is not a sexually transmitted infection.

Sexual intercourse can nevertheless trigger cystitis because bacteria from the person's own genital and bowel flora may be moved towards the urethra.

Painful urination is not always cystitis. Vaginal discharge, genital ulcers, urethral discharge, pain during intercourse or a relevant sexual-exposure history may suggest urethritis, vaginitis or a sexually transmitted infection and require a different assessment.

Who Needs Additional Assessment?

Assessment and treatment may differ in:

  • Pregnant patients
  • Men
  • Children
  • People with urinary catheters
  • People with kidney stones or urinary obstruction
  • People with impaired kidney function
  • Immunocompromised patients
  • People who have recently undergone urinary instrumentation
  • People with a history of antimicrobial-resistant urinary organisms

Urine culture and additional investigation are more commonly required in these groups.

When Should You See a Doctor?

Medical assessment is appropriate for:

  • Significant burning or pain during urination
  • Blood in the urine
  • Symptoms that do not improve with treatment
  • Symptoms that recur soon after treatment
  • Repeated cystitis episodes
  • Urinary infection symptoms during pregnancy
  • Urinary infection symptoms in a man

Fever, rigors, flank or back pain, nausea or vomiting, marked weakness, confusion or clinical deterioration may indicate kidney or systemic infection and require prompt medical assessment.

Have Your Urinary Symptoms Assessed

Burning during urination, urinary frequency or recurrent cystitis can be evaluated together with urine testing and underlying risk factors when necessary.

Frequently Asked Questions

What is cystitis?
Cystitis is inflammation of the bladder. In everyday use it usually refers to a localised lower urinary tract infection caused when bacteria travel through the urethra into the bladder. Common symptoms include burning during urination, frequency, urgency and lower abdominal discomfort.
Is cystitis contagious?
Typical bacterial cystitis is not considered an infection that spreads from one person to another. It usually develops when bacteria from the person's own bowel flora reach the urethra and bladder.
Is fever a symptom of cystitis?
High fever is not a typical feature of simple cystitis. Urinary symptoms accompanied by fever, rigors, flank or back pain, nausea or vomiting require assessment for pyelonephritis or another systemic urinary tract infection.
Does every episode of cystitis require a urine culture?
No. Culture is not mandatory for every typical episode in a low-risk woman. It is particularly important when systemic infection is suspected, symptoms are atypical, treatment fails, infection rapidly recurs, recurrent cystitis is being evaluated, resistant organisms are a concern or the patient is pregnant.
Are ultrasound or cystoscopy required for cystitis?
Ultrasound and cystoscopy are not routinely required for straightforward cystitis. Further investigation may be needed when stones, urinary obstruction, persistent haematuria, incomplete bladder emptying, interstitial cystitis or another urological disorder is suspected.
Is cystitis sexually transmitted?
Typical bacterial cystitis is not a sexually transmitted infection. However, sexual intercourse can move bacteria from a person's own genital and bowel flora towards the urethra and increase the risk of cystitis. Vaginal or urethral discharge may suggest a sexually transmitted infection and should be assessed separately.
What is recurrent cystitis?
Recurrent cystitis is defined as at least 2 episodes within 6 months or at least 3 episodes within 12 months. Recurrent episodes should be confirmed by urine culture and individual risk factors should be assessed.
How can recurrent cystitis be prevented?
Increasing fluid intake in people who normally drink little, reviewing spermicide use and avoiding prolonged delayed urination may help. Local vaginal oestrogen can be used in appropriate postmenopausal women. Methenamine hippurate or antibiotic prophylaxis can be considered in selected patients. Evidence for cranberry and D-mannose is more limited and partly conflicting.
Academic Hospital note: Repeated urinary symptoms should not automatically be assumed to represent another episode of cystitis. Urine culture, menopausal status, urinary anatomy, bladder emptying, stones and other conditions that can produce similar symptoms may need to be considered. You can book an appointment.

References

  1. Academic Hospital. Sistit Nedir? Belirtileri ve Tedavileri Nelerdir?
  2. European Association of Urology. EAU Guidelines on Urological Infections – 2026
  3. National Institute of Diabetes and Digestive and Kidney Diseases. Bladder Infection (Urinary Tract Infection) in Adults
  4. National Institute of Diabetes and Digestive and Kidney Diseases. Diagnosis of Bladder Infection in Adults
  5. National Institute for Health and Care Excellence. Urinary Tract Infection (Recurrent): Antimicrobial Prescribing