Leprosy is a curable disease. Relapses and reinfection can occur, but they are very rare. In your case the anaesthetic dry patch may be due to leprosy. However it is necessary to determine if it is active or not. If it is a case of burnt out leprosy, then you do not require any anti leprosy medicines but moisturisers. On the other hand, if it is active, then you may require muti-drug therapy (MDT). It is very likely that you belong to the former category as you have taken treatment in the past. Remember that some residual damage will remain after successful treatment. After treatment you should lead a normal life like any other person.