Where did leprosy break out on King Uzziah as he raged against the priests?

Answer: His forehead

With a censer in his hand, Uzziah raged at the priests, and leprosy broke out on his forehead beside the incense altar.

“Uzziah, with a censer in his hand to offer incense, was enraged. But while he raged against the priests in their presence in the house of the LORD before the altar of incense, leprosy broke out on his forehead.”— 2 Chronicles 26:19 (BSB)