No cure, and no, they don't go away either...If it's a new iPad, you might be able to get it swapped out if you find a friendly genius bar.
Is it possible to cure a dead pixel? Will it go away over time?
If its just 1 and not in the middle I wouldn't bother swapping it, I bought an iPad on launch day and I have only just got one that I'm happy with, it has 1 dead pixel in the very top right corner and can only be seen if your looking for it... I have had 12 iPads and they all had something wrong with them
Dead pixels can never be revived.