First and foremost, you can not should not ever attempt to perform any surgical procedure by yourself on your own body or on someone elses body.This procedure should only be done by a trained urologist or surgeon. Draining a hyrdocele may sound like a simple procedure but it is not as easily accomplished. It requires the use of a local anesthetic and syringe. Tapping the hydrocele provides an instant cure for the condition, but this is just a fleeting cure as the fluid refills again. To prevent this from happening, the urologist uses a sclerosing agent which causes the hydrocele to stick to itself thereby preventing it from re-filling. Alternatively, the hydrocele can be removed with a surgical procedure.
If a such a procedure were attempted independently you run the risk of blood clot formation, infection, or injury to the scrotal tissue or structures.