my scrotum is very itch but i don't have sexual intercourse about 5months now it all started with red big bump with no itch ang blistered when it heals it follows itch in my scrotum what you think it is?

my scrotum is very itch but i don't have sexual intercourse about 5months now it all started with red big bump with no itch ang blistered when it heals it follows itch in my scrotum what you think it is?
