"Shoe bite" (also called friction/pressure irritation) is exactly what you're describing - it's not a medical diagnosis itself, but a common term for the skin damage that happens when a shoe (especially heels with a rigid back or narrow toe box) repeatedly rubs or presses on your foot. Depending on severity it shows up as:
- Redness/darkening where the strap or shoe edge rubs (I can see some pinkish irritation across the top of your foot near the toe bases in your photo, consistent with strap or seam pressure)
- Blisters - fluid-filled bubbles from acute friction
- Calluses/corns - thickened, sometimes whitish, hardened skin from repeated pressure over time (there's a small pale/rough spot on your second toe that looks like this)
- Dark spots or hyperpigmentation - skin's healing response after repeated irritation, common with darker skin tones
Per Campbell's Operative Orthopaedics, hard corns form specifically when "an unyielding shoe toe box" generates repeated pressure and friction over a bony prominence, leading to a painful thickened lesion - Campbell's Operative Orthopaedics 15th Ed. Friction blisters form similarly but at a more superficial skin layer from shear forces - Fitzpatrick's Dermatology.
How to fix it
If it's a fresh blister/raw area:
- Clean gently with soap and water, don't pop an intact blister (it protects against infection).
- Cover with a thin layer of petroleum jelly or antibiotic ointment and a soft bandage or blister plaster.
- Avoid the same shoes until it heals.
If it's a callus or dark thickened patch:
- Soak feet in warm water 10-15 minutes to soften skin.
- Gently exfoliate with a pumice stone (never dig or cut it with sharp tools - risk of infection).
- Moisturize daily with a urea-based or thick emollient cream to keep skin soft and speed fading of dark patches.
- Use a gel toe sleeve, moleskin, or a "donut" pad around the sore spot so pressure is offloaded next time you wear the shoes.
Prevention (the real fix):
- Choose heels with a wider toe box and lower, more stable heel height.
- Break in new shoes gradually (short periods at first).
- Use silicone heel grips or insoles to stop your foot sliding forward into the toe box.
- Keep a barrier (petroleum jelly, blister-prevention stick, or a bandage) on known friction spots before wearing heels for long periods.
See a doctor/podiatrist if: the spot is very painful, oozing, spreading redness or warmth (signs of infection), you have diabetes or poor circulation, or a callus/corn keeps recurring despite footwear changes - it may need professional paring or an orthotic.
Nothing in your photo looks alarming (no signs of infection like pus, spreading redness, or fever-related warmth) - it looks like typical mild friction irritation/early callus formation that should resolve with the offloading and moisturizing steps above, plus giving your feet a break from that pair of heels for a bit.