This Is What Happens When You Wear Used Shoes

Other (Less Common) Causes

• Blisters: Severe friction can cause fluid-filled blisters, which may look yellowish if infection occurs.

• Fungal infections: Second-hand shoes can carry fungi, leading to athlete’s foot or nail infections. These usually cause itching, redness, peeling skin, or yellowed nails rather than a firm bump.

Why Used Shoes Cause More Problems

New shoes can cause issues while breaking in, but used shoes add extra risks:

• They’re already molded to someone else’s feet, creating uneven pressure points.

• Inadequate cleaning can transfer sweat, bacteria, or fungi, increasing irritation or infection risk.

(Images often show yellow corns or calluses caused by shoe friction.)

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