The three stages of chickenpox are the prodromal stage, the vesicular stage, and the crusting stage.
The prodromal stage is the first stage of chickenpox and is characterized by the onset of mild fever, chills, and fatigue. It usually occurs one to two days before the appearance of any rash. During this stage, the patient may also experience a headache, muscle aches, and a sore throat.
The vesicular stage is the second stage and is characterized by the eruption of small, itchy, red bumps on the face, scalp, and trunk. These bumps may blister and become filled with fluid. At this stage, the patient may also experience a high fever, swollen lymph nodes, and a cough.
The crusting stage is the third and final stage of chickenpox. At this stage, the blisters become scabbed. The scabs can take up to two weeks to separate from the skin, and the patient may still experience some itching during this time.
Once the patient has gone through all three stages of chickenpox, they will no longer be contagious. However, they may still experience some mild symptoms, such as fatigue, for a few weeks after the rash has cleared.