NHS GP & Women’s Health Specialist

Dr Sylvia Kama-Kieghe

You’ve noticed something — a change in discharge, a smell that wasn’t there before, a niggling sting when you wee. Now you’re stuck halfway between “it’s probably nothing” and a search history you’d rather no one ever saw.

Let me give you the clinical map so you can stop guessing — and know exactly when to act.

Watch First: 8 Vaginal Changes That Need Immediate Attention — A GP Explains

Why STI Symptoms Get Missed — Especially in Women

Here is the clinical reality I see in practice every week: most STIs in women cause no symptoms at all in the early stages. By the time symptoms do appear, the infection has often been present for weeks, sometimes months. That is why screening matters more than waiting for a sign.

The other problem is that STI symptoms in women overlap heavily with conditions that aren’t STIs — thrush, bacterial vaginosis (BV), urinary tract infections (UTIs), even hormonal changes. So women rule themselves out of an STI test because “it doesn’t quite fit.” Then the infection progresses. This post is to help you recognise patterns — not panic at every twinge — and to give you the language to ask for the right tests.

The 7 STI Symptoms Every Woman Needs to Recognise

1. Unusual Vaginal Discharge

Discharge changes are the single most common symptom that brings women into clinic. The key questions are: is the colour, smell, consistency, or volume different from your normal?

If your discharge has changed and is not behaving like your usual cycle pattern — get tested. Do not wait it out.

2. Pain or Burning When You Pee (Dysuria)

A burning sensation when urinating is most commonly caused by a UTI — but it is also one of the earliest symptoms of chlamydia and gonorrhoea. If you have had antibiotics for a UTI and the symptoms come straight back — request an STI screen. The two infections can present identically.

3. Pain During or After Sex (Dyspareunia)

New-onset pain during sex deserves investigation. It may be pelvic inflammatory disease (PID) — a serious complication of untreated chlamydia or gonorrhoea that can cause permanent damage to the fallopian tubes and lead to infertility. PID can present as deep pain, lower abdominal ache, and an unwell feeling alongside intercourse pain.

4. Bleeding Between Periods or After Sex

Intermenstrual bleeding and post-coital bleeding (bleeding after sex) are red-flag symptoms for chlamydia, gonorrhoea, and inflammation of the cervix (cervicitis). They also need to be investigated to exclude cervical changes and other gynaecological conditions. Either way — they are not “normal” and they always warrant a GP appointment.

5. Lower Pelvic Pain

Persistent pelvic pain that is not cyclical (not linked to your period) can indicate PID or other STI complications. This is particularly important if it is accompanied by fever, abnormal discharge, or a feeling of being unwell.

6. Sores, Blisters, Lumps, or Ulcers in the Genital Area

These can indicate:

• Herpes simplex — typically painful blisters or ulcers, often preceded by tingling
• Syphilis — a single painless ulcer (called a chancre) at the site of infection
• Genital warts — soft, painless growths caused by HPV strains 6 and 11

7. Itching, Soreness, or Rash in the Genital Area

Itching is usually thrush — but if it is persistent, doesn’t respond to over-the-counter treatment, or is accompanied by other symptoms in this list, get tested. Trichomoniasis in particular causes intense itching and irritation alongside discharge.

Watch: Don’t Ignore These Chlamydia Warning Signs

What Tests You Should Ask For — By Name

When you book your appointment, request a full sexual health screen. It includes:

You can self-refer to most NHS sexual health clinics — no GP letter needed. They are faster, more discreet, and frequently more comprehensive than a standard GP appointment.

Say this in the appointment: “I’d like a full STI screen including chlamydia, gonorrhoea, trichomoniasis, HIV, syphilis, and hepatitis.” That sentence covers everything.

Red Flags — When to Seek Help

NHS: Sexually Transmitted Infections (STIs) — Symptoms, Tests and Treatment

CDC: STI Screening Recommendations for Women

BASHH: National Guidelines for Sexual Health Screening

The Bottom Line

Most STIs in women cause no symptoms — which is exactly why testing matters more than guessing. If something has changed and is not behaving like you, do not assume it’s thrush, do not wait it out, and do not feel embarrassed to ask.

Sexual health clinics see thousands of women like you every week with the same questions — and they will treat you with no judgment and complete confidentiality. Your future fertility and long-term health depend on catching these things early. Book the test.

If you’ve ever been brushed off when you raised an STI concern — your story matters. Share it with women who are about to walk into that same appointment. → Join the free AskAwayHealth community

Similar Topics

• The Surprising Truth About Normal vs. Abnormal Vaginal Discharge
• Understanding STD Symptoms in Women: Causes and Signs
• 4 Common Risk Conditions for Early Pregnancy Bleeding
• 5 Reasons You May Be Experiencing Pain During Sex
• The Ultimate Guide to Preventing Ladies’ “Toilet Infections”