From the Guidelines
Testicles receding into the pelvis, known as testicular retraction, is a normal physiological response to cold temperatures, fear, stress, or physical activity, and is not typically a cause for concern unless accompanied by pain or swelling, in which case a healthcare provider should be consulted to rule out underlying conditions such as epididymitis or testicular torsion, as described in the American College of Radiology's guidelines for acute onset of scrotal pain 1, 2, 1, 2.
Normal Physiological Response
This happens because the cremaster muscle, which surrounds the spermatic cord, contracts and pulls the testicles closer to the body. This mechanism helps regulate testicular temperature, as sperm production requires temperatures slightly lower than core body temperature.
- In cold conditions, the testicles are drawn closer to benefit from body heat, while in warm conditions, they hang lower to stay cooler.
- This retraction can also occur during sexual arousal as part of the normal sexual response cycle.
Potential Underlying Conditions
If you experience painful retraction or testicles that remain retracted for extended periods, especially with pain or swelling, you should consult a healthcare provider as this could indicate an underlying condition such as:
- Hyperactive cremaster reflex
- Retractile testicle
- Epididymitis, which is the most common cause of acute scrotum in adolescent boys and adults, and can be diagnosed using ultrasound, as described in the American College of Radiology's guidelines 1.
- Testicular torsion, which is a surgical emergency that requires prompt recognition and treatment to prevent testicular loss, and can be diagnosed using ultrasound and clinical evaluation, as described in the American College of Radiology's guidelines 1, 2.
Importance of Medical Evaluation
It is essential to seek medical attention if you experience any symptoms of acute scrotum, such as severe pain, swelling, or redness, as delayed diagnosis and treatment can lead to irreparable testicular damage, as noted in the American College of Radiology's guidelines 1, 2.
- A healthcare provider can evaluate your symptoms and perform diagnostic tests, such as ultrasound, to determine the underlying cause of your symptoms and provide appropriate treatment.
- The American College of Radiology's guidelines provide a framework for the evaluation and management of acute scrotum, and emphasize the importance of prompt recognition and treatment of testicular torsion and other underlying conditions 1, 2, 1, 2.
From the Research
Testicular Retraction
The retraction of testicles into the pelvic cavity can be caused by various factors.
- One possible reason is the cremasteric reflex, which is a normal reflex that causes the testicles to retract into the pelvic cavity in response to cold temperatures or stress 3.
- Another possible reason is testicular torsion, which is a medical emergency that requires prompt treatment 4, 5, 6.
- Testicular ectopia or undescended testes can also cause the testicles to retract into the pelvic cavity 5, 3, 6.
- In some cases, testicular retraction can be a normal variant, and no underlying medical condition may be present 3, 7.
Related Medical Conditions
Several medical conditions can cause testicular retraction, including:
- Testicular torsion, which is a twisting of the testicle that can cut off blood flow and require emergency surgery 4, 5, 6.
- Undescended testes, which is a condition where one or both testes fail to descend into the scrotum 5, 3, 6.
- Testicular ectopia, which is a condition where the testes are located in an abnormal position 5, 3.
- Epididymitis and epididymo-orchitis, which are infections of the epididymus and testicle that can cause pain and swelling 7.