A hydrocele is a medical condition characterized by the accumulation of fluid in the sac surrounding the testicle. This can lead to swelling in the scrotum, which may be painless and often does not cause any serious health issues. Hydroceles can occur in newborns or develop later in life due to injury, infection, or inflammation. Diagnosis typically involves a physical examination and may include an ultrasound to confirm the presence of fluid. Treatment is usually not necessary unless the hydrocele causes discomfort or complications. In such cases, a minor surgical procedure may be performed to remove the excess fluid.