How are you? What other symptoms are present? If you are referring to a melanocytic nevus, a type of lesion that contains nevus cells, and laser treatment is not working, further evaluation may need to be done. Seeking another dermatologist's opinion may also help and to rule out differentials including melanoma. Take care and do keep us posted.
Thanks for replying doctor,
last week i went to meet my doctor, he said nothing can be done more as if he do more laser treatment skin may damage. i ask him what else i can do in treatment he said some diseases cant be cure and it is one of them. He has given me two creams one is Unitone4 advance white and another is kojivit. please tell what else i can ask my doctor in treatment so that my problem can be cured