"Nailbiting, or onychophagia, can lead to sore fingertips, which are more prone to infection if the nail is bitten very short. It can also lead to dental issues such as chipped enamel, gum injuries or gingival infection due to minor trauma."
"Because almost all of us have had chickenpox in our childhood, we tend to think of it as a benign, non-important condition. Thankfully, for most it is, but chickenpox can be severe for some people."