- Sexual health & STIs
- Testicular Pain
Sexual Health · Symptom Guide
Testicular Pain
A plain-English guide to what causes pain in the testicles, which signs are an emergency, and what a doctor actually does about it. Reviewed by a licensed physician at our men's health clinic in Bangkok.
- Sudden, severe pain? Call 1669 now
- Most causes are treatable, not emergencies
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Medically reviewed by Dr. Noppon Arunkajohnsak (Win)
Menscape Clinic
Last reviewed
11 July 2026
6h
The torsion window
surgery within about 6 hours saves most testicles
9 in 10
Saved when treated fast
salvaged if torsion is untwisted within 6 hours
1669
Thailand emergency line
call for sudden, severe one-sided pain
95%+
Chlamydia cure rate
with a full doxycycline course
Key takeaways
Sudden, severe pain in one testicle, especially with nausea or a high-riding testicle, can be torsion. This is an emergency: go to A&E or call 1669 within 6 hours.
Pain that builds over days with fever, burning on urination, or discharge is usually epididymitis, often an infection, and needs antibiotics soon.
A long-standing dull ache or heaviness, worse when standing, is often a varicocele and can be assessed without rush.
In sexually active men under 35, chlamydia and gonorrhoea are common causes, so an STI check is part of the workup.
Most causes of testicular pain are treatable. The real danger is waiting on the one that is not.
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Testicular pain, sorted by how fast it starts
Testicular pain has many causes, and the single most useful clue is how quickly it came on. Pain that arrives in minutes is treated very differently from an ache that has built over months.
The urgent one is testicular torsion, where the cord supplying the testicle twists and cuts off its blood supply. It is most common in teenagers and young men but can happen at any age, and it is the reason no sudden, severe testicular pain should be ignored.
Most testicular pain is not an emergency. Infection, enlarged veins, fluid collections, and pain referred from elsewhere are all common and all treatable. A doctor tells them apart with a short history, an examination, and usually an ultrasound.
Because the causes overlap, self-diagnosis is unreliable. The point of this guide is to help you judge how quickly to act, not to replace an examination.
Minutes to hours: torsion
Sudden, severe, usually one-sided pain, often with nausea. A twisted cord cuts off blood flow. A surgical emergency; treat within about 6 hours.
Days: epididymitis
Pain and swelling building over a day or two, often with fever, burning, or discharge. Usually infection; in men under 35 often a sexually transmitted one.
Weeks to months: varicocele or hydrocele
A dull ache, heaviness, or a soft swelling, often worse when standing. Enlarged veins or fluid around the testicle; rarely urgent.
Referred pain
A kidney or ureteric stone or a groin hernia can send pain into the testicle when the testicle itself is normal.
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When to worry, and where to go in Bangkok
Go now (A&E or 1669)
Sudden, severe pain in one testicle, especially if it woke you from sleep or comes with nausea, vomiting, a swollen or high-riding testicle, or abdominal pain. Do not wait to see if it settles. In Thailand, call 1669 for emergency medical services.
See a doctor this week
Pain building over days with fever, burning on urination, penile discharge, or a red, swollen scrotum. This points to infection and needs prompt antibiotics and testing.
Book when convenient
A long-standing dull ache or heaviness, worse at the end of the day or when standing, with no fever. Often a varicocele or hydrocele, worth assessing but rarely urgent. Any new lump should always be checked.
The torsion window. The testicle is most likely to be saved when the cord is untwisted within about 6 hours; the chance falls sharply after that. If in doubt, treat sudden severe pain as an emergency and call 1669.
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Epididymitis: the infection story
Epididymitis is inflammation of the epididymis, the coiled tube behind the testicle that stores sperm. It usually comes on over a day or two as a dull ache that becomes a swollen, tender, warm scrotum, often with a fever or burning on urination.
In sexually active men under 35, the usual cause is a sexually transmitted infection, most often chlamydia or gonorrhoea. In older men the cause is more often ordinary urinary bacteria such as E. coli. The distinction matters because it changes which antibiotic works.
Treatment is a targeted course of antibiotics, typically an injection plus a 10-day course of doxycycline when an STI is likely, chosen by your doctor after testing. Because it is frequently sexually transmitted, current partners usually need testing and treatment too. This is why we run an STI panel as part of the workup.
2 in 3
Under-35 cases from STIs
chlamydia or gonorrhoea, in sexually active men
95%+
Cure with doxycycline
for uncomplicated urogenital chlamydia
Guideline estimates; the balance of causes shifts with age and sexual history. Your doctor confirms the cause with testing before treating.
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How we find the cause
Examination
A brief, private physical exam of the scrotum and abdomen, checking the position and lie of the testicle, tenderness, swelling, and the cremasteric reflex. This alone can flag a possible torsion.
Scrotal ultrasound
A quick, non-invasive scan that shows blood flow to the testicle and tells torsion, epididymitis, varicocele, hydrocele, and lumps apart. It is the key imaging test for scrotal pain.
Urine and STI panel
A urine test for infection plus testing for chlamydia and gonorrhoea when a sexually transmitted cause is possible. Results guide the right antibiotic rather than a guess.
When we refer to hospital
If the exam or scan suggests torsion, or a testicular mass, we refer you straight to a hospital urology or surgical team. Torsion needs an operating theatre, not a clinic.
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Related at Menscape
Sexual Health · Testing
STD & STI testing
Confidential testing for chlamydia, gonorrhoea, and more, with same-day sampling. The first step when infection is the likely cause of the pain.
Sexual Health · Treatment
Chlamydia treatment
Doctor-prescribed antibiotic treatment for chlamydia and its complications, including partner-notification advice.
Urology · Referral
Chronic scrotal pain referral
For a long-standing ache, a varicocele, or an unexplained pain that has not settled, we assess and refer to a urologist when needed.
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How it works at Menscape
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Worried about testicular pain? Talk to us today.
Message us discreetly
Start a private chat on WhatsApp or LINE, or book directly. Tell us what you feel and how fast it came on. For sudden, severe pain we will tell you to go straight to A&E.
Same-day appointment
For pain that is not an emergency, we offer same-day slots at our clinic in Phrom Phong, Bangkok. No referral needed; expats and visitors are welcome.
Examination and tests
A licensed doctor examines you in a 15-minute consultation and arranges an ultrasound, urine test, or STI panel as needed, usually the same visit.
Treatment or referral
If it is an infection, you leave with a clear treatment plan. If it needs a hospital, we refer you quickly to the right specialist.
This is not an emergency service. If your pain is sudden and severe, go to the nearest A&E or call 1669 immediately rather than waiting for an appointment.
Medically reviewed by
Dr. Noppon Arunkajohnsak (Win)
Menscape Clinic, Bangkok
“Testicular pain frightens men into silence, and silence is the real danger. Come in early. Most of what I see is easily treated, and for the rare emergency, hours genuinely matter.”
- Reviewed
- 11 July 2026
- Next review
- January 2027
- Editorial standard
- Each guide is checked against the Thai FDA label and the primary literature, then reviewed by a licensed physician.
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Frequently asked questions
Is testicular pain always serious?
No. Most causes, like infection or enlarged veins, are treatable and not dangerous. The exception is testicular torsion, which is why sudden, severe pain in one testicle should always be treated as an emergency.
How do I know if it's torsion?
Torsion usually means sudden, severe, one-sided pain, often with nausea, a swollen or high-riding testicle, and sometimes waking you from sleep. You cannot rule it out yourself, so treat sudden severe pain as an emergency and call 1669.
How long can I wait with sudden testicular pain?
Not long. For torsion, the testicle is most likely to be saved if the cord is untwisted within about 6 hours. After that the chance falls quickly, so do not wait to see if it settles.
Could my testicular pain be an STI?
It can be. In sexually active men under 35, chlamydia and gonorrhoea are common causes of epididymitis, the infection behind much testicular pain. That is why an STI panel is part of the assessment.
What is a varicocele?
A varicocele is a cluster of enlarged veins above the testicle, often described as feeling like a bag of worms. It can cause a dull ache or heaviness that is worse when standing. It is common and not usually urgent, but worth assessing, especially if fertility is a concern.
Do I need a scan for testicular pain?
Often, yes. A scrotal ultrasound uses no needles and shows blood flow and structure, which helps tell torsion, infection, and varicocele apart. Your doctor decides based on the examination.
Can I get seen the same day in Bangkok?
Usually yes. For pain that is not an emergency we offer same-day appointments at our clinic in Phrom Phong. For sudden severe pain, go straight to A&E or call 1669 instead.
Is the consultation private?
Yes. Consultations are private and judgment-free. You can start with a WhatsApp or LINE chat, and any examination is done discreetly at the clinic.
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References
1. Sharp VJ, Kieran K, Arlen AM. Testicular torsion: diagnosis, evaluation, and management. Am Fam Physician. 2013;88(12):835-840.
2. European Association of Urology (EAU). Guidelines on Paediatric Urology: the acute scrotum. 2024.
3. Centers for Disease Control and Prevention. Sexually Transmitted Infections Treatment Guidelines, 2021: Epididymitis. MMWR Recomm Rep. 2021;70(4).
4. British Association for Sexual Health and HIV (BASHH). United Kingdom national guideline for the management of epididymo-orchitis. 2010.
5. Geisler WM, et al. Azithromycin versus doxycycline for urogenital Chlamydia trachomatis infection. N Engl J Med. 2015;373(26):2512-2521.
6. American Urological Association (AUA) / American Society for Reproductive Medicine (ASRM). Diagnosis and Treatment of Infertility in Men: AUA/ASRM Guideline, 2021 (varicocele).
7. National Institute for Emergency Medicine (NIEM), Thailand. Emergency medical services hotline 1669.
This guide is educational information, not medical advice, and it does not replace an examination. If you have sudden, severe testicular pain, seek emergency care immediately or call 1669.
This guide is part of the Menscape sexual-health library
Explore the condition hubTesticular pain? Get it checked, don't wait it out.
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