If the chickenpox virus are stayed in the body either in inactivated form, there are chances to become activated with the help of surroundings and they results as shingles. Mainly older people are the suspect of having shingles but the children may also being affected by it. Sine our immune system decreases with our growing age because of taking medications so chances of attack of those viruses increases.
These viruses can also enter into our nerve cells and send messages from the skin to the brain. They can stay for many years and convert into herpes zoster virus. Now this can be very harmful for us since they are easily spreadable into various parts of the body such as chest, stomach and back also.