<s>[INST] Sir my sis wants to get married wid the guy whose grandpa is having leprosy white spots on most of d part of his body so is it so leprosy is hereditary how i will suppose to know that it is not n so want to know everythg regarding leprosy white spots . plz sir reply as soon as possible. [/INST] HIT hanks for posting your query to Chat Doctor .  White spots may be due to leprosy, but there are many skin conditions that can cause white spots other than Leprosy. So are you sure that he has Leprosy ?  Coming to your question Leprosy is due to infection and not hereditary. It can get transmitted from person to person by close physical contact.  If you need to know then he has to be tested (Grandpa). You need to do a split skin smear and look for SEPRA bacilli. What I mean to say is unless you do a formal testing you won't come to know if its leprosy or not.  But one clue is there will be loss of sensation over the white spots, so you can test by pricking with a pin over the white spots.  Any clarifications or Queries feel free to ask.  Happy to help you.  Regards. </s>