Severe testicular injury is uncommon and usually results from either a direct blow to the scrotum or a straddle injury. Damage occurs when the testis is forcefully compressed against the pubic bones. A spectrum of injuries may occur.
http://www.aafp.org/afp/1999/0215/p817.html
In the majority of cases in which bacteria are the cause, only one side of the scrotum or the other is the locus of pain. Non-infectious causes are also possible. Reflux of sterile urine (urine without bacteria) through the ejaculatory ducts may cause inflammation with obstruction.
https://en.wikipedia.org/wiki/Epididymitis
The mean age of patients who present with epididymitis is 41 years. The acute form usually develops over the course of several days, with pain and swelling frequently in only one testis, which will hang low in the scrotum. There will often be a recent history of dysuria or urethral discharge.
https://en.wikipedia.org/wiki/Epididymitis
Definition [edit]. Testicular pain is when part or all of either one or both testicles hurt. Pain of the scrotum is often included. It may be either acute, subacute or chronic depending on its duration.
https://en.wikipedia.org/wiki/Acute_scrotum
Pain in the scrotum is also often included. Testicular pain may be either acute, subacute or chronic depending on its duration. Causes rank from benign muscular skeletal problems to emergency conditions such as Fournier's gangrene and testicular torsion.
https://en.wikipedia.org/wiki/Acute_scrotum
Testicular torsion usually presents with an acute onset of diffuse testicular pain and tenderness of less than 6 hrs of duration. There is often an absent or decreased cremasteric reflex, the testicle is elevated, and often is horizontal.
https://en.wikipedia.org/wiki/Acute_scrotum
Epididymitis is the most frequent cause of acute onset scrotal pain in adults. In contrast with men who have testicular torsion, the cremasteric reflex (elevation of the testicle in response to stroking the upper inner thigh) is not altered.
https://en.wikipedia.org/wiki/Epididymitis
None of the conditions responsible for acute scrotal pain or swelling has a single pathognomonic finding, but the combined background information and physical findings frequently suggest the correct diagnosis (Table 1) .
http://www.aafp.org/afp/1999/0215/p817.html
Epididymitis is usually characterized as either acute or chronic: if acute, the onset of testicular pain is often accompanied by inflammation, redness, and warmth in the scrotum; if chronic, pain may be the only symptom.
https://en.wikipedia.org/wiki/Epididymitis
Testicular torsion represents a surgical emergency because the likelihood of testicular salvage diminishes with the duration of torsion. Therefore, the family physician must act quickly to identify or exclude this condition in any patient who presents with an acute scrotum. This article reviews an approach to the diagnosis and treatment of the acute scrotum (Figure 1) .
http://www.aafp.org/afp/1999/0215/p817.html
causes of acute scrotal pain
Epididymitis is the cause of acute scrotal pain. Epididymitis is a cause of acute scrotal pain.