What Is Interstitial Cystitis, and Why Does My Bladder Hurt?

It feels like a urinary tract infection, again. The pressure, the constant urge, the burning ache low in your belly. You’ve been given antibiotics before, more than once, and the tests came back clear. The pain stayed.

What it feels like

The NIDDK¹ lists discomfort, pressure, tenderness or pain in the bladder, lower abdomen and pelvic area. The NHS³ says it can cause pain in the lower tummy or back and a feeling that you want to pee all the time, often passing small amounts, waking at night to go, and pain during sex. MedlinePlus² lists bladder pressure, a frequent urge to urinate, burning pelvic pain and pain during intercourse.

The pattern matters. The NHS³ says symptoms can come and go over time, with flare-ups, and MedlinePlus² says symptoms tend to come and go with periods of lesser or worse severity.

Who gets it, and why

MedlinePlus² says the condition typically appears between ages 20 and 40, and that women are 10 times more likely than men to have it. The cause is unknown, MedlinePlus says. The NHS³ describes the inner lining of the bladder as irritated and inflamed, and says it may stem from an immune system problem or from the bladder wall being sensitive to substances in urine, though the exact trigger isn’t clear.

How it’s diagnosed

There’s no single test. The NHS³ says doctors use blood and urine tests, a pelvic exam, ultrasound or a cystoscopy, which looks inside the bladder with a small camera, to rule out other conditions such as UTIs. MedlinePlus² says providers rule out sexually transmitted infections, bladder cancer and kidney stones. The NIDDK¹ says IC is identified by eliminating other conditions with similar symptoms, through a medical history, a physical exam and tests.

That’s why a clear urine culture doesn’t mean nothing is wrong. It means one cause has been checked off.

Our articles on frequent urination, a tight pelvic floor and pelvic floor dysfunction cover conditions that can overlap with these symptoms.

What helps

There’s no cure. The NHS³ says so, and MedlinePlus² adds that there are no standard treatments, so what works is individual and often found step by step.

Diet. The NIDDK¹ says certain foods and drinks can make symptoms worse, such as alcohol, citrus juices, chocolate and tomatoes. The NHS³ says to keep a food diary because certain foods and drinks may make symptoms worse, and to avoid spicy and acidic foods and limit alcohol and caffeine. MedlinePlus² says to eliminate bladder irritants one at a time.

Bladder training and physical therapy. The NIDDK¹ lists bladder training and physical therapy. MedlinePlus² lists bladder training and pelvic floor physical therapy.

Movement and stress. The NHS³ suggests low-impact exercise such as walking, swimming or yoga, and says mental health and physiotherapy support are also available.

Medicines and procedures. The NHS³ lists painkillers, medicines that reduce bladder activity, Botox injections and nerve stimulation devices. The NIDDK¹ lists medicines, bladder stretching and bladder instillation, and the choice often involves a combination.

The play

Try this: a bladder and food diary

For two weeks, note each food and drink, and your pain on a scale of 1 to 10 at the end of the day.

Add how many times you urinated and any urgency or flares.

Remove one suspected irritant at a time rather than dozens at once, so you know which one matters. Bring the diary to your appointment.

When to get checked

Don’t wait if

1. Urgent

   If you have a fever, pain in your back or side, or blood in your urine, get care right away.

MedlinePlus² says to seek care if you have IC symptoms, in particular because it’s often confused with repeated UTIs. The NHS³ says to see a GP if the pain persists or you need to pee significantly more often.

Book an appointment if any of these fit:

• Bladder pain, pressure or urgency has lasted for weeks
• You’ve had repeated “UTIs” with negative cultures
• Sex is painful
• You’re waking at night to urinate and it’s affecting sleep
• Diet changes haven’t helped
• Pain is affecting your mood or daily life

The pain is genuine, even when the culture is clear. The next step is a clinician who will look past the infection question.