Causes of Lower Back Pain Accompanied by Unilateral Testicular Pain
Testicular pain is one of the most common conditions encountered in andrology clinics. It often arises from trauma, inflammation, or tumors affecting the testes, which may impair the normal function of vital reproductive organs. What, then, are the possible causes of concurrent low back pain and unilateral testicular pain? The following section addresses this question.

Causes of Concurrent Low Back Pain and Unilateral Testicular Pain
Clinically, acute orchitis is the most common cause of simultaneous low back pain and unilateral testicular pain. Acute orchitis is frequently accompanied by epididymo-orchitis or funiculitis (inflammation of the spermatic cord), which may refer pain to the lumbar region. Physical examination typically reveals marked testicular enlargement, significant tenderness over both the spermatic cord and testis, thickening of the spermatic cord, and erythema of the scrotal skin. Systemic symptoms such as urinary frequency, urgency, fever, nausea, and vomiting are commonly present.
Another possible cause is urolithiasis—specifically, urinary tract stones. Such stones can induce lumbar pain that radiates to the inguinal region, thereby causing referred testicular pain. Therefore, patients experiencing concurrent testicular and low back pain should seek prompt medical evaluation to establish an accurate diagnosis and initiate appropriate treatment without delay.
Common causative pathogens of orchitis include Escherichia coli and Staphylococcus aureus. Risk factors often involve prolonged urinary retention, extended periods of sitting, phimosis or redundant prepuce, excessive alcohol consumption, unprotected or unhygienic sexual activity, and poor personal hygiene. Management of orchitis requires bed rest and systemic intravenous antibiotic therapy, with a typical treatment duration of approximately two weeks for full resolution.
The above outlines the primary causes of concurrent low back pain and unilateral testicular pain. We hope this information is helpful to you.