Diseases time lengths vary, from short periods to more elongated and complicated periods. Thus, understanding the stages of a disease is a way to anticipate post-complications. It is indispensable to perceive the development pathway that a disease takes, as occasionally a disease triggers another disease. For instance, chickenpox incubates the first stage of shingles many years later. Generally, shingles spans several decades, from childhood itchy chickenpox to debilitating complication known as post-herpetic neuralgia (PHN). The path that shingles takes consists of three phases which are prodromal phase that precedes the acute phase by days, and finally the chronic phase.
Physicians demonstrated that if a person ever had chickenpox,