Getting rid of mole on face with apple cider vinegar was scab now a red circle on face. How to get rid of circle?

Not sure but... Given that using apple cider vinegar to get rid of a mole is not a standard recommended medical treatment (even though to my surprise it's reported to often help) I have no information to definitively answer your question. Often there is redness after a scab comes off. It will probably get better on it's own, but my favorite treatment for skin irritation/inflammation is calendula cream/ointment.