Mole is a benign condition. But, you have mole on back which make you uneasy.
There may mild infection in mole which may produce irritation or the pressure on mole may cause stinging sensation. Or it may be psychological. In any case, if it is embarassing, consult dermatologist
and have removal of mole. The mole may be excised under local anaesthesia. And it is simple OPD procedure. So,do not worry.
I hope you got my answer.
Dr. Ilyas Patel MD