The most common type of hard skin on the feet is callus, which is related to local pressure and walking friction, and manifests itself as yellow patches of thickened keratinization in the metatarsal area of the foot. For treatment, you can soak your feet in hot water every day, then use a razor blade to cut off the thickened skin, of course, you can also go to a professional podiatry store for trimming. Topical topical medication can choose salicylic acid cream, or retinoic acid cream, which has the effect of dissolving and exfoliating the keratin. If there is no obvious self-conscious symptoms, it can also be left untreated. Normally, you should try to wear loose, soft-soled shoes to avoid friction and irritation, and reduce walking, which also has a relieving effect on this condition.