Acute Cystitis: Causes, Symptoms, and Treatment
Medically reviewed by Sumiran Racherla, MD, Internal Medicine. Last reviewed: October 23, 2026.
What kind of doctor treats Acute Cystitis?
A family doctor or primary care doctor treats acute cystitis. Women may see a gynecologist or a urologist (a doctor who treats the urinary tract) if infections keep coming back. A direct primary care or concierge doctor can be a first stop for an evaluation and can refer you to a specialist when needed.
What is acute cystitis?
Acute cystitis is an infection of the bladder or lower urinary tract. Acute means the infection begins suddenly. It is also called a bladder infection. It is the most common type of urinary tract infection (UTI), an infection of the bladder, urethra, or kidneys. Most cases are uncomfortable, but they go away without problems after treatment. The infection commonly develops in the bladder, and it can also spread to the kidneys.
Symptoms
The symptoms of a bladder infection include:
- Cloudy or bloody urine.
- Strong or foul-smelling urine.
- Low fever. Most people will not have a fever.
- Pain or burning with urination.
- Pressure or cramping in the groin or lower abdomen.
- A strong need to urinate often, even right after the bladder has been emptied.
Often in an older person, mental changes or confusion are the only signs of a possible infection.
Causes and who gets it
Cystitis is caused by germs, most often bacteria. The germs enter the urethra, the tube that carries urine out of the body, and then the bladder. Most cases are caused by Escherichia coli (E. coli). It is a type of bacteria found in the intestines.
Women tend to get infections more often than men. Their urethra is shorter and closer to the anus, so bacteria can enter the urinary tract more easily. Women are more likely to get an infection after sexual intercourse. Other things that raise your chances include:
- A tube called a urinary catheter inserted in your bladder.
- Blockage of the bladder or urethra, or an enlarged prostate that blocks the flow of urine.
- Diabetes.
- Pregnancy.
- Older age.
- Problems fully emptying your bladder.
How doctors diagnose it
Your doctor can determine if you have a UTI. In many cases, you give a urine sample for these tests:
- Urinalysis, a test of your urine. It looks for white blood cells, red blood cells, bacteria, and chemicals such as nitrites in the urine. Most of the time, your doctor can diagnose cystitis with a urinalysis.
- Urine culture. This test identifies the bacteria in the urine and helps decide on the correct antibiotic. It is often not needed to start treatment.
Treatment
Antibiotics taken by mouth treat the infection. They also help stop it from spreading to the kidneys. It is important that you finish all the antibiotics prescribed, even if you feel better before the end of treatment. If you do not finish them, you may develop an infection that is harder to treat. Let your doctor know if you are or may be pregnant.
Your doctor may also prescribe a medicine to ease discomfort. Phenazopyridine hydrochloride (Pyridium) is the most common one. It can turn your urine orange or red. You will still need to take antibiotics. Antibiotics may rarely cause side effects such as nausea, vomiting, or diarrhea. Report these to your doctor, and do not just stop taking the pills.
Everyone with a bladder infection should drink plenty of water. Do not drink fluids that irritate the bladder, such as alcohol and caffeine.
When to see a doctor
Contact your doctor if you have symptoms of cystitis. Get care right away if you develop new symptoms such as fever, back pain, stomach pain, or vomiting. These can be signs that the infection has spread to your kidneys. A kidney infection is less common than a bladder infection but is more serious. Call 911 if you faint, have trouble breathing, or are confused or very hard to wake.
How a direct primary care or concierge doctor fits in
A direct primary care doctor charges a flat monthly fee instead of billing insurance, while a concierge doctor usually charges more and often works alongside insurance. This doctor can check your urine and prescribe antibiotics for a simple bladder infection. If infections keep coming back, they can look for the cause and refer you to a urologist.
Common questions
Is acute cystitis the same as a urinary tract infection?
It is one type of urinary tract infection. A bladder infection (cystitis) is the most common type of UTI. UTIs can also happen in the urethra or kidneys, so not every UTI is a bladder infection.
Can acute cystitis spread to my kidneys?
Yes. The infection commonly develops in the bladder, and it can also spread to the kidneys. That is why you should take all of your antibiotics. A kidney infection is less common than a bladder infection but is more serious.
Do I need antibiotics?
Yes. Antibiotics treat UTIs. For a bladder infection, you take them by mouth. Your doctor can determine if you have a UTI and what antibiotic you need. Finish all of your medicine, even if you feel better.
How can I help prevent bladder infections?
Drink plenty of fluids and stay well hydrated. Wipe from front to back after using the bathroom. Urinate before and after sexual activity. Take showers instead of baths, and do not douche or use feminine hygiene sprays or powders.
Sources
- MedlinePlus - Cystitis - acute
- CDC - Urinary Tract Infection Basics
- MedlinePlus - Urinary tract infection in women - self-care
Medical Disclaimer
This content is for general educational and informational purposes only and is not medical advice. It is not a substitute for professional medical advice, diagnosis, or treatment, and reading it does not create a doctor-patient relationship. Always seek the advice of your physician or another qualified health provider with any questions about a medical condition, and never disregard or delay seeking professional advice because of something you read here. If you think you may have a medical emergency, call 911 (or your local emergency number) immediately.
