单侧睾丸有隐痛可能由多种原因引起。比如附睾炎就可能导致单侧睾丸隐痛，附睾炎多由细菌感染引起，常见于中青年男性。
附睾炎导致的隐痛情况
感染途径： 附睾炎可分为急性附睾炎和慢性附睾炎。急性附睾炎常继发于尿道、前列腺或精囊感染，细菌可通过输精管逆行侵入附睾。慢性附睾炎则多由急性附睾炎未彻底治愈迁延而来。急性附睾炎发作时，单侧睾丸会突然出现疼痛，疼痛可向腹股沟区放射，还可能伴有阴囊红肿、发热等症状；慢性附睾炎的隐痛症状相对较轻，可能会反复出现单侧睾丸隐痛，时轻时重。
精索静脉曲张引发的隐痛
发病机制： 精索静脉曲张是因精索内静脉回流受阻或瓣膜失效，血液反流所致。多见于青壮年男性。精索静脉曲张时，患侧阴囊会有坠胀感、隐痛，疼痛可放射至下腹部、腹股沟区。站立过久或行走劳累后症状加重，平卧休息后症状可缓解。轻度精索静脉曲张可能仅表现为单侧睾丸隐痛，严重时阴囊表面可见曲张的静脉团。
睾丸外伤后的隐痛情况
受伤情况： 如果单侧睾丸曾受到过外伤，比如撞击、骑跨伤等，即使当时受伤不严重，也可能会遗留隐痛。外伤可能导致睾丸内部组织损伤、血肿机化等情况，从而引起长期或间断的单侧睾丸隐痛。例如，有过阴囊外伤史的人，之后可能会时不时感觉到单侧睾丸有隐痛感。
testicular torsion-related pain
Twisting situation: Testicular torsion is a surgical emergency. It occurs when the spermatic cord twists, cutting off the blood supply to the testicle. It can happen at any age but is more common in adolescents. The main symptom is sudden and severe pain in one testicle, which may be accompanied by swelling. If not treated in time, it can lead to testicular necrosis. However, sometimes there may also be a situation of intermittent or mild pain due to partial or slow twisting, which can be easily overlooked initially.