Calluses, where are they on your feet? If they develop 'here,' it could pose a risk to joint health.

Calluses tend to form easily on the feet, mainly on the heels or the protruding areas under the toes.

If corns develop on other areas, it could indicate poor spinal and joint health.

Director Jeong Ho-won of Yonsei Geonwoo Hospital said, "The location of corns on the foot can indicate issues with the spine or joints, or an improper gait," and added, "Even when wearing uncomfortable shoes that put pressure and friction on specific parts of the foot, corns can form in unexpected areas."

If calluses are only on one foot, scoliosis should be suspected.

If you cannot evenly distribute your weight on both feet while walking, calluses will form on one side only.

If left uncorrected, it can cause back pain, leg numbness, and in adolescents, it may hinder height growth.

Calluses that develop on the inside or outside of the sole of the foot may be a sign of misalignment in the hip joint or knee joint.

When a joint is dislocated, the foot twists into an "八" shape when walking or leans inward, causing the weight to be unevenly distributed.

Director Jeong Ho-won said, "If you do not correct your gait, certain parts of your knee joints may wear out severely when walking, leading to arthritis."

If a callus develops below the second toe, be cautious of bunion deformity (the big toe bone bending toward the little toe).

It is a sign that weight is not evenly distributed on the soles of the feet but is leaning forward.

Wearing high-heeled shoes frequently increases the likelihood of developing calluses in this area.

It is better to wear shoes that have a cushioning feel, are not too high-heeled, and do not tightly constrict the feet.