If you’ve noticed changes in your body after sexual activity, don’t panic — but don’t ignore them either. Here are 10 common signs of STI you should take seriously.

⚠️ Important: Some STIs show no symptoms at all. Regular testing is the only way to be sure.

1. Unusual Genital Discharge

Changes in color, smell, or consistency of vaginal or penile discharge may signal an infection.

• Yellow, green, or grey discharge

• Strong or unpleasant odor

• Thick or frothy texture

Possible causes include chlamydia, gonorrhoea, or trichomoniasis. If discharge suddenly changes, get tested promptly.

2. Painful or Burning Urination

A stinging or burning sensation when urinating is a common STI symptom.

It may indicate:

• Chlamydia

• Gonorrhoea

• Urinary tract infections (UTIs)

Because symptoms overlap, proper medical testing is essential for diagnosis.

3. Genital Sores, Blisters, or Bumps

Painful or painless sores around the genitals, anus, or mouth can be linked to:

• Genital herpes

• Syphilis

• Human papillomavirus (HPV)

Even small or painless lesions should be examined by a healthcare professional.

4. Persistent Itching or Irritation

Ongoing itching, redness, or irritation in the genital area may be caused by:

• Yeast infections

• Trichomoniasis

• Allergic reactions

If symptoms don’t improve within a few days, testing is recommended.

5. Lower Abdominal or Pelvic Pain

Unexplained lower abdominal pain — particularly in women — can be a sign of pelvic inflammatory disease (PID), often caused by untreated STIs like chlamydia or gonorrhoea.

Left untreated, PID can affect fertility, so early treatment is crucial.

6. Fever or Flu-Like Symptoms

Some STIs can cause early flu-like symptoms, including:

• Fever

• Fatigue

• Swollen glands

• Body aches

Acute HIV infection, for example, can initially resemble the flu. If you’ve had recent high-risk exposure, consult a healthcare provider immediately.

7. Irregular Bleeding or Menstrual Changes

Bleeding between periods, heavier cycles, or pain during menstruation may be linked to infections such as chlamydia or gonorrhoea.

Any sudden menstrual change that persists should be evaluated.

8. Pain During Intercourse

Sex should not be painful. Discomfort during intercourse may signal:

• Inflammation

• Vaginal infections

• Cervical infections

• Pelvic inflammatory disease

Persistent pain deserves medical attention.

9. Rashes or Skin Changes

Unexplained rashes — especially on the genitals, palms, or soles — can be a sign of syphilis or other infections.

Skin changes combined with other symptoms increase the need for testing.

10. Swollen Lymph Nodes

Swelling in the groin, neck, or armpits can indicate your immune system is fighting an infection.

When paired with other symptoms, swollen lymph nodes may point to conditions like herpes or HIV.

When Should You Get Tested for an STI?

You should consider testing if:

• You’ve had unprotected sex

• You have a new partner

• You notice any of the symptoms above

• A partner informs you of possible exposure

• It’s been 6–12 months since your last test

Many STIs are asymptomatic, meaning regular screening is important even without symptoms.

How to Protect Yourself

✔️ Use condoms consistently
✔️ Get tested regularly
✔️ Limit high-risk encounters
✔️ Communicate openly with partners
✔️ Seek treatment immediately if diagnosed

Early treatment prevents complications and reduces transmission risk.