After reading your history it appears that you might have secondary changes over the affected area of the mole. You can apply a calamine lotion with cortisone
cream over the affected area. It will be better for you to take a good suggestion from a dermatologist
. You can take benadryl
for itching part. You may need removal of mole to completely cure the problem. In between you can take a course of oral antibiotic or apply gentamycin
cream over the affected area.