FOOT CARE JOURNAL 01
What Is a Foot Corn, Really?
The Tiny Core Behind the Sting
It usually introduces itself mid-stride: on the stairs out of Hiroo Station, or somewhere along the walk from Roppongi to Azabu. A small, hard spot on the sole or the side of a toe, and a sharp little sting every time your weight lands on it. That is a corn.
Its Latin name is clavus, the word for a nail, the kind you hammer. Once you know how a corn is built, the name makes sense.
Skin protects itself. When the same spot is pressed or rubbed again and again, it lays down extra layers of keratin, the same tough protein your nails are made of.
If the pressure is spread over a wide area, you get a callus: thick, a little rough, and usually painless. If the pressure lands on one point, say a toe knuckle against the inside of a shoe, the skin builds inward instead. It packs itself into a dense, cone-shaped core that points down like a wedge.
The real tako 🐙
In Japanese, a corn is uonome, or “fish eye,” named for the round, glassy core at its center. A callus is tako, which is also the word for octopus (same sound, different kanji). The octopus is the cuter of the two.
That core is why it hurts. Its tip presses toward the dermis, the living layer under the surface where the nerve endings are, so every step pushes it a little deeper.
On the surface a corn can look no bigger than a grain of rice and still sit surprisingly deep. That’s why “it’s only a corn” rarely holds up for long.
Most of us reach for a pumice stone or a drugstore pad, file the top away, and feel the relief. Then, a few weeks later, it’s back in exactly the same spot.
So why does a corn you removed so carefully come back to the very same place?
If a corn is very painful or keeps coming back, or if you have diabetes or circulation concerns, please see a doctor or podiatrist before treating it yourself.
When it’s hard to read your own feet, a second pair of eyes helps.
At Colors Hiroo Nail Lounge, foot care is a treatment of its own, never an afterthought. Over the years, we have kept refining how we care for callused skin and heels.
It can be done in the same visit as your gel manicure or pedicure: an unhurried hour in a modern Japanese house, two minutes’ walk from Hiroo Station.
Reservations are made through Hot Pepper Beauty, an external Japanese booking site. English-language plan details are listed further down that page; please scroll down to find them.
Colors Hiroo Nail Lounge
5-3-8 Hiroo, Shibuya-ku,
Tokyo
Mon–Fri 10:00–21:00
Sat, Sun & Holidays 11:00–20:00