What should you know about mumps testicular swelling?

Mumps is a viral illness that can inflame the testicle, usually with tenderness, warmth, heaviness, or visible enlargement. Testicular swelling is a recognised complication, but it can also arise from torsion, injury, hernia, or another infection. A clinician must assess the pattern rather than assuming the cause. Mumps may also involve fever and swollen glands near the jaw; read about [Mumps](/conditions/mumps/) and [Swollen Glands](/symptoms/swollen-glands/).

Contact a healthcare service promptly if one or both testicles become swollen or painful during a suspected or confirmed mumps illness. Rest, wear supportive underwear, and use a wrapped cool pack briefly if it eases discomfort. Keep fluids up and use suitable pain relief according to the label or a clinician's advice. Avoid sex and strenuous activity until assessed and symptoms have settled. Call before attending if mumps may be contagious; a [GP Consultation](/treatments/consultations-and-assessment/gp-consultation/) can direct you.

Go to urgent care immediately for sudden or severe testicular pain, a testicle sitting unusually high, nausea or vomiting with pain, or rapidly increasing swelling. Seek prompt advice for fever, persistent tenderness, urinary symptoms, or swelling that does not improve. Emergency assessment matters because testicular torsion can threaten blood flow and cannot be distinguished safely at home.

Could this be mumps-related inflammation or another urgent problem? Do I need an ultrasound or other examination? What activity, pain relief, and follow-up are appropriate?