If the hydrocele persists for longer than normal or it's causing pain and other symptoms, then see your family physician for an examination. Hydroceles are not serious, but your doctor will want to rule out other relatively serious conditions that can appear similar, such as: an inguinal hernia, varicocele, infection, benign tumor or testicular cancer. Once a diagnosis of a hydrocele is made, your options are essentially all surgical. Medications are not effective.  Your doctor may use diagnostic ultrasound, an MRI or a CT scan to better visualize what's going on inside the scrotum. Shining a bright light through the scrotum can tell if the fluid is clear (indicating a hydrocele) or murky, which could be blood and/or pus. Blood and urine tests are helpful to rule out infections, such as epididymitis, the mumps or various STDs. Once the hydrocele is diagnosed, the least invasive procedure is to have the fluid drained from the scrotum by a needle, which is called aspiration. After a topical anesthetic is given, a needle is inserted into the scrotum to penetrate the hydrocele, then the clear fluid is removed. If the fluid is bloody and/or pus-filled, then that indicates an injury, infection or perhaps cancer. This procedure is very quick and doesn't require much recovery time — usually just a day or so.  Needle drainage of a hydrocele is not done all that often because the fluid usually accumulates again, requiring more treatment.  Sometimes the needle has to be inserted through the inguinal (groin) area if the hydrocele has formed higher in the scrotum or partially outside of it. The most common and effective way of dealing with a persistent and/or symptomatic hydrocele is to remove the hydrocele sac along with the fluid — called a hydrocelectomy. This way, there's only about a 1% chance of the hydrocele developing again. The surgery is either performed with a scalpel or a laparoscope, which has a tiny camera attached to a long cutting device. Hydrocele surgery is typically done at an outpatient clinic under...

===
Write a summary of the previous text in Vietnamese:
Đến bác sĩ để được thăm khám. Rút dịch ra ngoài. Phẫu thuật loại bỏ hoàn toàn túi dịch. Thư giãn trong thời gian chờ hồi phục.