Thank you for the query.
If the mole starts itching, any redness
appears around it, should be verified by a dermatologist
. They have special microscope (dermatoscope) to watch such lesions and are able to tell either it is suspicious or not.
If the mole will be suspicious, it should be removed completely (needle biopsy
is not performed). Such removal is called a biopsy. If done completely, mole wont regrow. Moreover it will allow to test is by a hystopathologist (under a microscope). This will tell either the lesion is malignant or not.
Hope this will help.