Lichen simplex chronicus pathology was done in 2008 saying;biopsy of skin on chin show hyperkeratosis without fungal infestation, spongiotic changes of the epidermis and a superficial perivascular chronic inflammatory cell infiltrate composed of primari

This . This is very challenging without a clinical examination. This could be lichen simplex chronicus, prurigo nodularis, or other possibilities. Certainly i would get it looked at to be sure so i would recommend you see a dermatologist to further evaluate the area. There are many treatment options to helps these conditions. I hope that helps!