Genital herpes has an intermittent onset because herpes cannot be said to be cured and never recurs. The herpes virus congregates at the sacral nerve roots in the human body. Therefore, when immunity is low, the virus travels along the sacral nerve root to the surface of the skin, causing damage in spots, commonly known as a recurrence of herpes. Thus, genital herpes does not heal on its own; it is merely in a quiescent phase of an outbreak. Therefore, genital herpes is generally harder to treat in females than in males because the female body has a cavity, and herpes inside the cavity may not be visible.