18, Sep, 2025

The Most Common STI Symptoms in Men and Women and When to Worry

Sexually transmitted infections (STIs) are more common than many people realise. In fact, cases of Chlamydia, Gonorrhoea, and Syphilis are rising across the UK. The challenge is that some STIs cause noticeable symptoms, while others remain completely silent. This leaves many people unsure about when to seek help.

If you’re sexually active, knowing the warning signs can help you protect your health and your relationships. Here’s what to look out for — and when it’s time to get tested.

STI Symptoms in Women

Women often experience subtle symptoms that can be mistaken for thrush, urinary infections, or menstrual changes. Common warning signs include:

Unusual vaginal discharge (different colour, texture, or smell)
Pain when urinating
Bleeding between periods or after sex
Lower abdominal or pelvic pain
Itching, redness, or soreness around the genital area
Pain during sex

It’s important not to dismiss these signs. Untreated infections like Chlamydia or Gonorrhoea can lead to pelvic inflammatory disease (PID), which can cause infertility, ectopic pregnancy, and long-term pelvic pain.

👉 If you notice any of these symptoms, book a confidential test at STI Clinic today.

STI Symptoms in Men

Men may find their symptoms more obvious, but some infections still go unnoticed. Common indicators include:

Unusual discharge from the penis
Burning or pain when urinating
Pain or swelling in the testicles
Itching or irritation inside the urethra
Sores, blisters, or rashes on the genitals
Rectal pain, bleeding, or discharge (for infections acquired through anal sex)

Even without symptoms, infections can still cause long-term harm, including infertility and an increased risk of passing infections to partners.

👉 Don’t wait for pain or discomfort. Protect your health with a same-day STI test at STI Clinic.

Symptoms That Affect Both Men and Women

Some STIs show up in ways that can affect anyone, regardless of gender:

Sore throat after oral sex (possible Gonorrhoea or Chlamydia)
Blisters or sores (Herpes)
Genital warts (HPV)
Flu-like illness or swollen glands (possible HIV or Syphilis)
Persistent rash or unusual skin changes

These symptoms can easily be confused with minor infections or skin conditions. That’s why testing, not guessing, is the safest approach.

When to Worry

You should consider STI testing if:

You have any of the symptoms listed above
You’ve had unprotected sex with a new partner
Your partner has been diagnosed with an STI
You or your partner have multiple partners
You simply want peace of mind

Because many STIs cause no symptoms at all, waiting until you feel unwell is risky. Routine testing helps catch infections early, when they are easiest to treat.

Worried About STI Symptoms?

Our private STI clinic offers fast, discreet testing and expert advice. Schedule your appointment now and stay protected.

Why Regular Testing Matters

The NHS recommends regular STI checks for anyone under 25 who is sexually active, and for anyone with new or multiple partners. But even if you’re outside these groups, testing is still an important part of taking care of your health.

At STI Clinic, we offer discreet, accurate testing with fast results. Whether you’re worried about specific symptoms or just want reassurance, there’s a package to suit your needs.

👉 Stay safe and in control. Book your confidential STI screen at STI Clinic.

Final Thoughts

STIs are common, treatable, and often preventable. But the biggest danger is ignoring them because symptoms are mild or absent. If you notice changes in your body, or even if you feel perfectly fine but want reassurance, testing is the most responsible step you can take.

Your health and peace of mind are worth it.

👉 Don’t wait until symptoms get worse. Book your STI test now with STI Clinic.