Hydroceles are benign swellings of the scrotum.
They are very common and more often than not need no treatment. Hydroceles do not harm the testicle in any way. Hydroceles often occur in infants, and these hydroceles usually reabsorb on their own during the first year of life. Occasionally they occur in older children and need a surgical repair. To understand hydroceles one must understand the anatomy of the scrotum, or the sac that contains the testicles.