How long does it take for chickenpox bumps to come out fully?

The time it takes for chickenpox bumps to come out fully can vary from person to person. Typically, the bumps will start to appear within 10-21 days after exposure to the virus. The bumps will then develop over the course of 1-2 days, reaching their full size. After reaching their full size, the bumps will typically crust over and begin to heal within 1-2 weeks.