What is the reason why a child's testicles are bigger on one side and smaller on the other

The fact that a child's testicles are larger on one side and smaller on the other may be due to normal physiological developmental differences, or it may be a manifestation of certain diseases. It is necessary to determine whether intervention is needed based on the specific reasons. Common causes include normal development, hydrocele, testicular ectopia, etc. If other symptoms are found, please seek medical attention promptly.

1. Normal physiological developmental differences

Due to the influence of hormone levels, blood flow supply, and genetics during testicular development, there may be a difference of about 1-2 millimeters in size between the left and right sides. This slight asymmetry usually does not affect sexual function or fertility, and is a normal physiological phenomenon that does not require special intervention. Parents can regularly observe their children's growth and development to ensure overall health.

2. Pathological factors: Common causes and manifestations of abnormalities

Hydrocele: In some newborns, the incomplete closure of the sheath process between the abdominal cavity and scrotum may cause scrotal effusion, which is manifested as a significant enlargement on the egg side, usually soft and palpable with watery waves. Hydrocele may self absorb within 1 year of age, but if it continues to worsen, surgical treatment is necessary.

Testicular ectopia or non descent: If the testicles have not fully descended to the scrotum, it may also lead to significant differences in size between the left and right sides. The undescended testicles may be stuck in the groin, abdominal cavity, and other areas, affecting sperm production function. Minimally invasive surgery is required to place the testicles in their normal position. Epididymitis or trauma: Local injury or inflammation may cause unilateral swelling or atrophy, resulting in mild to moderate pain. If a child has a history of scrotal trauma, infection, etc., they should seek medical attention as soon as possible and improve their condition through medication or necessary anti infective treatment.

3. The influence of genetic and environmental factors

If there is a history of congenital testicular developmental abnormalities in parents or immediate relatives, parents should pay special attention to their children's development. If a mother ingests harmful substances such as tobacco, alcohol, or drugs during pregnancy, or if the fetus may be affected by endocrine disruptors, it may affect testicular development. If genetic or environmental factors are confirmed, professional guidance should be sought from a doctor.

4. Other rare causes

such as tumors or vascular malformations may also lead to local swelling or asymmetry, but this situation is relatively rare. If a child's testicles are significantly asymmetrical and accompanied by pain, fever, or other abnormal symptoms, the child should be immediately taken to the hospital for relevant examinations. If parents notice that their child's testicles are larger on one side and smaller on the other, they should observe whether they are accompanied by other symptoms such as persistent pain, redness, swelling, or developmental delay. If the cause is uncertain or the discomfort symptoms worsen, it is recommended to go to the hospital for ultrasound examination as soon as possible to rule out potential pathological factors, and take appropriate treatment measures under the guidance of professional doctors.