References UK clinical guidance from the NHS, the British HIV Association (BHIVA), and the British Association for Sexual Health and HIV (BASHH). Last updated: April 2026.
Itchy skin in the genital area is uncomfortable and worrying, but it’s not always an STI. Skin conditions like genital psoriasis, eczema, contact dermatitis and fungal infections can all cause similar itching. Testing and clinical assessment help distinguish between them so you get the right treatment.
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Common Causes of Genital Itching
| Cause | Key Features |
|---|---|
| Genital psoriasis | Smooth red patches, sometimes with silvery scale |
| Eczema | Dry, itchy, cracked skin |
| Contact dermatitis | Reaction to soaps, lubricants, condoms |
| Fungal infection (thrush/jock itch) | Red ring-shaped rash or white discharge |
| Scabies | Intense itch, worse at night, tiny tracks |
| Pubic lice | Itch with visible lice or eggs |
| Herpes | Painful blisters then ulcers |
| Trichomoniasis | Discharge, smell, itching |
How to Tell STIs From Skin Conditions
- STIs usually involve discharge, sores or blisters alongside itch
- Psoriasis has well-defined smooth patches, often with history elsewhere
- Eczema is dry and flaky; STIs are usually not
- Contact dermatitis resolves when the irritant is removed
- Testing confirms or rules out STIs
Genital Psoriasis
- More common than many people realise
- Appears as smooth, red, well-defined patches
- Usually no scale (unlike body psoriasis)
- Can affect vulva, penis, groin folds
- Not an STI — not contagious
- Treated with gentle topical steroids
When to Seek Help
- Itching persisting more than a week
- Blisters, sores or unusual discharge
- After a new sexual partner
- Worsening despite self-treatment
Read more: Skin rashes and STIs | Jock itch | Red spots and STIs
Frequently Asked Questions
Is genital psoriasis contagious?
No — it’s an immune condition, not an infection.
Should I test for STIs if I have genital itch?
If there’s any doubt or recent sexual contact, yes.
Can I use regular steroid cream on my genitals?
Only mild ones — seek medical advice first.
Related reading
- Abnormal Genital Discharge and Chlamydia
- Asymptomatic STIs: Silent Infections Explained
- Causes of Painful Sex and How to Treat It
- Cold Sores vs Syphilis Sores: How to Tell the Difference
- Common STI Symptoms in Women
Sources
- NHS — Sexual health conditions
- BASHH — UK clinical guidelines for STI management
- British HIV Association (BHIVA) — HIV treatment guidelines
- Terrence Higgins Trust — sexual health information
- UK Health Security Agency — STI surveillance data
Steve Page is a recognised expert on Sexually Transmitted Diseases (STDs) and STD treatments, having published numerous articles in peer-reviewed journals and presented his research at conferences around the world. He has an in-depth understanding of the latest medical research on STDs, and is an advocate for the development of new treatments and protocols to improve the health of those affected. In addition to his research, he has dedicated his career to understanding the causes and symptoms of STDs, as well as how to best treat those impacted.
