This can be stated in active form. Alternate translation: "God gave me a thorn in the flesh" or "God allowed me to have a thorn in the flesh" (See: [[rc://en/ta/man/translate/figs-activepassive]])
Here Paul's physical problems are compared to a thorn piercing his flesh. Alternate translation: " an affliction" or "a physical problem" (See: [[rc://en/ta/man/translate/figs-metaphor]])