Two red flags in your underwear that could signal a rare STI infection

While the main symptoms of common STI’s are typically well known, signs of lymphogranuloma venereum (LGV) can be particularly concerning for those infected.

Many Brits are familiar with the symptoms of more common STI’s, like chlamydia and gonorrhoea.

But did you know that blood or pus from the anus in your underwear or after using toilet paper could signal a “relatively rare” infection?

Lymphogranuloma venereum (LGV) is caused by a particular strain of chlamydia bacteria and can be particularly concerning for those infected.

According to NHS Inform, the main symptoms can include “swollen lymph glands in the groin on one or both sides or an ulcer or sore on the penis, vagina or around the anus.

“It can also cause permanent swelling of the genitals” and “scarring and swelling” of the skin if left untreated.

NHS Inform added: “Rectal infection can also cause swelling and scarring resulting in the risk of long term bowel complications.

“Rarely the infection may spread via the bloodstream causing inflammation of the joints or liver.”

Want to get the latest health news direct to your inbox? Sign up for the Mirror Health newsletter HERE

Carriers can still pass the infection onto a partner, even if they experience no symptoms.

LGV is “mostly acquired by men who have sex with men” and is “very rare” among women.

The health site states: “The main way of getting LGV is by having unprotected anal, vaginal or oral sex (without a condom).”

The risk of getting LGV can be increased by:

Other symptoms include:

“If your chlamydia test is positive, and your symptoms suggest that you may have LGV, the lab will do a further test for LGV,” says NHS Inform.

“When testing for LGV, a swab is taken from the back passage (rectum), vagina, throat or an ulcer (if you have one). A pee (urine) sample can also be used.

“If this sample tests positive for chlamydia and your doctor or nurse thinks you might have an LGV infection, the sample undergoes further testing for LGV. This can take up to three weeks.”

If you think you may have LGV it is advised that you make an appointment with your GP or local sexual health services.

As with all STIs the best way to reduce your risk is to practice safer sex.

And if you have a new partner, make sure that you both have a sexual health check-up before you have sex without condoms.