Ringworm!

"......"
Fjordic Provost was stunned!
He knew that ringworm, also known as money moss and lotus leaf ringworm, is a common skin disease, mainly caused by fungal infection of the skin!
Copper ions are natural antibacterial agents and have a strong inhibitory effect on fungi...
Therefore, in the past, if people in the countryside got ringworm, they would use a copper coin to rub it!
Use the copper ions on the copper coins to inhibit the growth of fungi on the skin!
If a child...