Hi Thank you for asking HCM. I have gone through your query. Chicken pox vesicles tends to occur in succession of crops. So there can be newly emerging ones and old crusted vesicles at the same time. If one stays for long time then it can be a pimple. You can apple brilliant green on the vesicles. This is a good antiseptic for virus and bacteria. Hope this may help you. Let me know if anything not clear. Thanks.