It is better when one reports alternative translations using the "Report Problem" button (right under the sentence). The authors can work with such reports better than with messages in the discussion. They also may miss a message in the discussion but not a report.
У вас болить зуб? "Does your tooth hurt?" The verb, "does hurt," is "болить."
"Є" is the verb "to be/to have." It doesn't work with "to hurt."