Genital herpes

Also called Herpes simplex

Genital herpes is a common sexually transmitted infection caused by the herpes simplex virus, the same virus that causes cold sores. It spreads through skin-to-skin contact, including vaginal, anal and oral sex. Many people have no symptoms. Once you have the virus, it stays in the body and can cause outbreaks from time to time.

Last updated Nov 9, 2026

What it is

Outbreaks usually become milder and less frequent over time.

Antiviral medicines can shorten outbreaks and, taken regularly, can reduce how often they happen. Condoms reduce the risk of passing it on.

Common signs

  • Small blisters that burst to leave red, open sores on the genitals, anus or thighs
  • Tingling, burning or itching
  • Pain when peeing
  • Flu-like symptoms with the first outbreak

How it is usually diagnosed

  • Examination by a sexual health clinic
  • A swab from a blister

Records worth keeping

Keeping these together makes each appointment easier, especially when you see a new doctor:

  • Swab results
  • Sexual health clinic letters
  • Notes about outbreaks and treatment

Questions to ask your doctor

  • Should I take antiviral medicine regularly?
  • How can I avoid passing it on?
  • Does it affect pregnancy?

When to get help right away

Call 112 or go to the nearest emergency department if you have:

  • Herpes symptoms late in pregnancy: contact your midwife or doctor straight away

This page is general information. It is not a diagnosis and does not replace a doctor who knows your history. Medfold keeps your records organised; it does not interpret them.

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