Orthodoxy: buy a tube of scald cream and touch it three times. Don't let the wound get wet during this period, it will recover soon.
Folk earthwork: Mix mussel shells (big mussel shells in the river) with dog oil (sesame oil can be used without dog oil, and the effect is second to none), then burn it into ashes and smear it on the tourist surface of the wound, and the effect is also good.
The first method above, I treated sunburn, and the second method, I treated burns with poker when I was a child. Everything's fine.