Feet itch and ache. A hard lump, like frostbite.

This phenomenon may be related to improper shoes, strenuous exercise, and excessive friction causing local cuticle extrusion. In addition, inflammation, infection, and chilblain may also occur. If you are worried, you may seek medical examination; if chilblain is diagnosed, you may locally use antibacterial, anti-inflammatory, and antipruritic drugs.