What Is Cystitis? UTI Symptoms, Pharmacy First and Red Flags

Cystitis is a bladder infection, the commonest form of urinary tract infection (UTI): bacteria from the bowel, usually E. coli, travel up the short female urethra into the bladder and inflame it, causing burning when you pee, a need to go often and urgently, cloudy or smelly urine and an ache low in the tummy.¹ In England a pharmacist can assess a woman aged 16 to 64 who is not pregnant or breastfeeding and supply the same antibiotics a GP would under Pharmacy First; a GP may instead ask you to "wait for 48 hours before getting antibiotics", with paracetamol and fluids as separate self-care.^{1, 2} Bacterial vaginosis gives discharge and smell but not burning; the Wellgard guide to what causes BV covers that side.

Sources checked on 29 October 2026.

What is cystitis, and how does a woman get a urinary tract infection?

"UTI" is the umbrella: an infection anywhere from the urethra to the kidneys. Cystitis is the bladder version and accounts for most of them; a kidney infection (pyelonephritis) is the serious one above.^{1, 3}

Women get them because the urethra is short and sits close to the anus. E. coli from the bowel colonises the skin around the urethra, is pushed in and multiplies in the bladder; it causes about 80% of kidney infections in women.⁴ In a study of 229 young women with recurrent UTI against 253 without, the measured risk factors were sex (4 to 8 times in the past month: odds 5.8 times higher), spermicide (1.8), a new partner in the past year (1.9), a first UTI before 15 (3.9) and a mother with a history of UTIs (2.3).⁵ The NHS adds pregnancy, wiping back to front, not drinking enough, the menopause, diabetes and catheters.¹ Can toilet paper cause UTIs? Only by direction; the NHS lists wiping back to front.

What are the symptoms, and the five red flags that mean a GP today?

The NHS list: pain or burning when peeing, needing to pee more often, at night and more urgently, cloudy urine, blood in the urine, pain low in the tummy or in the back under the ribs, a high or very low temperature with shivering, and feeling tired or weak.¹ A "silent UTI", with confusion as the only clue, is a pattern in older, frail people and catheter users.¹

Five signs mean the infection may have reached the kidneys and need a GP or 111 today: a high temperature or feeling hot, cold and shivery; pain in the lower back or side, under the ribs; blood in the urine; feeling or being sick; and symptoms getting worse quickly or not improving within 48 hours of starting treatment.^{1, 3} Pregnancy (see UTIs in pregnancy), age 65 or over, diabetes, a catheter or a weakened immune system put any UTI in that category. Call 999 if you are confused, drowsy or have difficulty speaking: a kidney infection can cause sepsis.^{1, 3}

Dipstick, culture and "negative tests but symptoms"

A dipstick checks urine for traces of bacteria and white cells; the NHS says a urine test "is not always needed".¹ A culture grows the bacteria over a day or two and reports which antibiotics work; ask for one when a course has not worked, infections recur, or the dipstick is negative but symptoms persist.

Two explanations. One is that it is not a UTI: thrush and trichomoniasis (both sting on peeing, both give discharge), chlamydia, irritation from soaps or spermicide, bladder pain syndrome (interstitial cystitis) and, after the menopause, the thinning of the urethra and vagina that comes with low oestrogen.¹ Does BV show up in a urine test? No; BV needs a vaginal swab rather than a urine dipstick, and is it thrush, BV or something else? separates the vaginal causes. The other is a long-term (chronic) UTI, which the NHS says can be caused by bacteria entering the bladder lining and which urine tests do not always pick up; ask your GP for a specialist referral if treatment has not worked.¹ Can you have bacteria in urine without an infection? Yes, and it is best left alone: among 673 young women with recurrent UTIs and bacteria in their urine but no symptoms, those given antibiotics for it had more symptomatic infections over the next year (47% against 13%).⁶

Pharmacy First, the GP and the 48-hour wait: what the NHS says

A community pharmacist in England can consult a woman aged 16 to 64, not pregnant or breastfeeding, and supply antibiotics where the pathway allows.^{1, 2} The GP has three options: antibiotics, self-care with painkillers, or a 48-hour wait to see if it settles.¹ In a trial of 494 women given an antibiotic or ibuprofen first, two-thirds of the ibuprofen group recovered without antibiotics, with a higher burden of symptoms and more kidney infections.⁷

Self-care, per the NHS: paracetamol, enough fluid to pass pale urine regularly, and avoiding fruit juice, coffee and alcohol.¹ Cystitis sachets and cranberry drinks "may help" some women avoid infections, but the NHS says there is no evidence they ease symptoms or deal with an infection already under way.¹ Worst things to do: hold on, take leftover antibiotics, wait out a red flag. Getting better means burning and urgency easing day by day; nothing changed at 48 hours means a GP.¹

Recurrent UTI: the definition and the NICE options

Recurrent UTI means two in six months or three in a year, and earns a GP appointment and a culture.¹ The NICE guideline (NG112, updated 2024) sets out vaginal oestrogen for women in or past the menopause (see vaginal health after the menopause), a single antibiotic dose for a known trigger, the non-antibiotic tablet methenamine hippurate and a daily low-dose antibiotic, then specialist referral; the trial figures behind each option, with the triggers, are on why UTIs keep coming back.^{1, 8, 9}

Water, cranberry, D-mannose and live cultures in one line each

Extra water (1.5 litres a day) cut episodes from 3.2 to 1.7 a year in 140 women; cranberry products cut recurrent UTIs by about a quarter in the 2023 Cochrane review (relative risk 0.74); D-mannose made no difference in 598 UK women (51% against 56%); live cultures showed no significant reduction in the six placebo-controlled trials (352 people) of the 2015 Cochrane review (relative risk 0.82).^{10, 11, 12, 13} The full grading is in do D-mannose and cranberry work for UTIs?

What we don't know

How many women with typical symptoms and a negative dipstick have an infection the test missed: the NHS says tests do not always pick up a long-term UTI.¹ Whether leaving symptomless bacteria alone is as safe in older women as in the young women studied.⁶

Frequently asked questions

How long does cystitis usually last?

Mild cases often settle within days; in a UK trial, immediate antibiotics still meant about three and a half days of moderately bad symptoms. No improvement at 48 hours is the NHS cue to see a GP.^{1, 17}

What is the fastest way to get rid of a UTI (cystitis)?

Assessment and, where appropriate, antibiotics, from a pharmacist (women 16 to 64) or a GP, plus paracetamol and fluids. No drink or sachet removes the bacteria;^{1, 2} can a UTI go away on its own covers the wait and the self-care.

What does E. coli in a urine test mean, and is it contagious?

The lab grew the bacterium behind most UTIs: E. coli from the bowel, not a food-poisoning strain and not an STI; it is not passed between people as a UTI, though sex moves bowel bacteria towards the urethra.^{1, 14}

Can recurrent UTIs be a sign of something else, such as diabetes or bladder cancer?

Usually not. NICE asks GPs to consider a bladder-cancer referral for people aged 60 and over with recurrent or persistent unexplained UTIs, and visible blood in the urine that persists after treatment is a referral at 45 and over.^{15, 16} Poorly controlled diabetes is on the NHS list of risk factors.¹

Does apple cider vinegar help cystitis?

We found no trial of apple cider vinegar, by mouth or as pills, for cystitis or any urinary tract infection (PubMed, 14 October 2026). The NHS self-care list is paracetamol, fluids and avoiding drinks that may irritate the bladder, named as fruit juices, coffee and alcohol; vinegar is acidic and sits closer to that list than to a remedy.¹

Sources

1. NHS. Urinary tract infections (UTIs), reviewed 11 July 2025. nhs.uk/conditions/urinary-tract-infections-utis.
2. NHS. How pharmacies can help (Pharmacy First conditions), reviewed 30 July 2024. nhs.uk/nhs-services/pharmacies/how-pharmacies-can-help.
3. NHS. Kidney infection, reviewed 13 February 2025. nhs.uk/conditions/kidney-infection.
4. Czaja CA, et al. Population-based epidemiologic analysis of acute pyelonephritis. Cohort analysis, 3,236 cases, Seattle. Clinical Infectious Diseases, 2007. PubMed 17599303.
5. Scholes D, et al. Risk factors for recurrent urinary tract infection in young women. Case-control study, 229 women with recurrent UTI and 253 without. Journal of Infectious Diseases, 2000. PubMed 10979915.
6. Cai T, et al. Asymptomatic bacteriuria in young women with recurrent urinary tract infections: to treat or not to treat? Prospective study, 673 women, 12 months. Clinical Infectious Diseases, 2012. PubMed 22677710.
7. Gágyor I, et al. Ibuprofen versus fosfomycin for uncomplicated urinary tract infection in women. Randomised trial, 494 women, 42 German practices; German federal research funding. BMJ, 2015. PubMed 26698878.
8. Raz R, Stamm WE. A controlled trial of intravaginal estriol in postmenopausal women with recurrent urinary tract infections. Double-blind placebo-controlled trial, 93 women. New England Journal of Medicine, 1993. PubMed 8350884.
9. Harding C, et al. Alternative to prophylactic antibiotics for the treatment of recurrent urinary tract infections in women (ALTAR). Open-label randomised non-inferiority trial, 240 women; NIHR funded. BMJ, 2022. PubMed 35264408.
10. Hooton TM, et al. Effect of increased daily water intake in premenopausal women with recurrent urinary tract infections. Open-label randomised trial, 140 women, 12 months. JAMA Internal Medicine, 2018. PubMed 30285042.
11. Williams G, et al. Cranberries for the prevention of urinary tract infections. Cochrane review, 50 trials, 8,857 people; recurrent-UTI subgroup 8 trials, 1,555 women. Cochrane Database of Systematic Reviews, 2023. PubMed 37068952.
12. Hayward G, et al. D-mannose for prevention of recurrent urinary tract infection among women (MERIT). Double-blind placebo-controlled trial, 598 women, 99 UK GP practices. JAMA Internal Medicine, 2024. PubMed 38587819.
13. Schwenger EM, et al. Probiotics for the prevention of urinary tract infections in adults and children. Cochrane review, 9 trials, 735 people. Cochrane Database of Systematic Reviews, 2015. PubMed 26695595.
14. Flores-Mireles AL, et al. Urinary tract infections: epidemiology, mechanisms of infection and treatment options. Narrative review. Nature Reviews Microbiology, 2015. PubMed 25853778.
15. NICE. Suspected cancer: recognition and referral (NG12), recommendations 1.6.4 and 1.6.5, updated 15 April 2026. nice.org.uk/guidance/ng12.
16. NHS. Bladder cancer: symptoms, reviewed 15 April 2025. nhs.uk/conditions/bladder-cancer/symptoms.
17. Little P, et al. Effectiveness of five different approaches in management of urinary tract infection. Randomised trial, 309 women, UK primary care. BMJ, 2010. PubMed 20139214.

This article is general information, not medical advice; the red flags above mean a GP, 111 or 999.

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