Quick Answer
Urinary tract infections are caused by bacteria (usually E. coli) entering the urethra, often triggered by sexual activity. UTIs are not STIs, though they share symptoms with STIs. They are treated with antibiotics and are not transmitted from partner to partner.
- Not an STI: bacterial infection of the urinary tract
- Caused by: E. coli entering the urethra
- Sexual activity: common trigger, not cause
- Treatment: antibiotics, hydration, cranberry (limited evidence)
Context Most Pages Skip
UTIs and STIs overlap in symptoms — burning, urgency, frequency — but they are completely different conditions.
Key Facts
UTIs are not contagious. They occur when bacteria from the gastrointestinal tract enter the urethra. Sexual activity is a common trigger, which is why the term "honeymoon cystitis" exists. Treatment is antibiotics.
⚕️ This page is educational and does not replace advice from a licensed clinician. If you may have been exposed to an STI, get tested — most infections are manageable, and many are fully curable.
Sources & Further Reading
- CDC — Sexually Transmitted Infections
- CDC STI Treatment Guidelines
- WHO — Sexually transmitted infections fact sheet
- MedlinePlus — Sexually Transmitted Diseases
Figures reflect CDC surveillance and WHO estimates; they are population statistics, not personal risk predictions.