Other Possible Causes (Less Common)

Blisters: Intense friction can initially cause fluid-filled blisters, which may appear yellowish if infection develops.

Fungal infections: Shoes worn by others can carry fungi that lead to athlete’s foot or nail infections. These typically cause itching, redness, peeling skin, or yellowing nails rather than a firm bump.

Why Second-Hand Shoes Are More Likely to Cause Problems

While new shoes can cause issues during the break-in period, used shoes come with extra concerns:

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

Poor sanitation can transfer sweat, bacteria, or fungi, increasing irritation or infection risk.

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

How to Treat It

Most yellow bumps improve with basic home care:

Change footwear: Stop wearing the problematic shoes. Choose well-fitting pairs with roomy toe boxes and good cushioning.

Soak and smooth: Soak your feet in warm, soapy water for 10–20 minutes, then gently use a pumice stone or emery board. Don’t cut the skin yourself.

Reduce friction: Apply corn pads, moleskin, or gel toe protectors.

Moisturize: Use creams containing urea to soften thickened skin.

OTC treatments: Salicylic acid pads can gradually break down corns.

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