Beriberi, but when washing socks, my hands will itch very much, probably infected to my hands.

Beriberi is caused by fungal infection, it is contagious. It is recommended to wear gloves when washing socks. Patients need to soak their feet with white vinegar or foot light powder. After soaking their feet, they also need to apply antifungal ointment in local treatment. Usually, they should keep their feet clean. It is best to wear cotton breathable shoes and socks.