Swelling in the scrotum sac filled with fluid that forms around a thin sheath surrounding a testicle. It’s mostly common in babies and requires no treatment. In adult males, it could be caused due to an injury or an infection if you have scrotal swelling. Hydroceles are usually painless but may become large and inconvenient. See your doctor to rule out other causes that are more harmful such as testicular cancer. If symptoms become painful or the swelling doesn’t go away after 6 months, adults seek medical attention. If left untreated Hydrocele can cause various severe and life-threatening complications. Our medical expert for surgery can help answer all your queries regarding Hydrocele.