What Should I Do When My Big Toe Is Swollen, Red, And Discolored With A Painful Spot Near The Toenail?

so so big toe is swollen and red. There is a spot on the top of the toe that looks like infected. But the whole toe is blue very discolored. When he took his shoe off his other toes at the tips where discolored some. He says it hurts at the end of his toenail. He can move his toe fine