Cracked heels are not necessarily athlete's foot. Athlete's foot is caused by fungal infections. You can visit the dermatology department of a hospital for a fungal test on cracked heels. If a fungal infection is present, then it can be confirmed as athlete's foot. If there is no fungal infection, it is likely to be fissure eczema, which is a type of allergic reaction and a particularly stubborn type of eczema. It is recommended to exclude athlete's foot infection at a standard hospital. If it is a fungal infection, using antifungal ointments such as Naftifine-Ketoconazole cream can cure it. If it belongs to fissure eczema, the treatment is more troublesome, requiring oral medication combined with topical application, and it tends to recur, not easy to completely eradicate. Avoid using hot water for washing the area, consume more vegetables and fruits to supplement vitamins and trace elements.