Sexually transmissible infections

If you have unprotected sex, you may be at risk of a sexually transmissible infection (STI).

Many STIs have no symptoms so people are unaware they are passing on an infection.

Symptoms associated with STIs


  • a sore, wart, lump, rash or blister on the genitals
  • pain during sex
  • pain passing urine
  • abnormal vaginal bleeding
  • an unusual vaginal discharge
  • painful, irregular periods and/or bleeding between periods or after sex.


  • a discharge from the penis or rectum
  • a sore, wart, lump, rash or blister on the genitals or around the anus
  • an itch or soreness of the penis
  • pain passing urine
  • painful or swollen testicles
  • abdominal pain.

Take any symptoms seriously and have a sexual health check. If there is an infection, you can get treatment and advice on how to stay healthy. Some of the symptoms you may be experiencing could have many causes - they do not necessarily mean you have an STI.

However, very often, a person can have an STI without knowing it. A person with an STI may look perfectly healthy because the infection doesn’t cause obvious symptoms. While some infections appear to go away without treatment, they stay active in the body. This means infections can be passed on to your sexual partners and/or cause health problems later.

If you are concerned you have an STI, talk about it with your local doctorfamily planning clinic or sexual health clinic and avoid having sex until you have received medical advice.

Common STIs

Reduce your risk of STIs by having safe sex.