What could be the cause of a dull pain in the left testicle after sitting for a long time?

A dull pain in the left testicle after prolonged sitting may be caused by various factors. Common causes include reproductive system disorders such as orchitis and epididymitis, which can lead to testicular swelling and pain. In addition, varicocele may also cause similar symptoms; especially when sitting for long periods, impaired blood return can worsen the discomfort. In rare cases, such symptoms might be related to serious conditions like testicular torsion, although this typically presents with more severe pain and swelling. To determine the exact cause, it is advisable to seek timely medical evaluation. A doctor will make an accurate diagnosis based on symptoms, physical examination, and necessary laboratory or imaging tests, and then develop an appropriate treatment plan. Meanwhile, maintaining healthy lifestyle habits and avoiding prolonged sitting may help alleviate and prevent the occurrence of such symptoms.