Deep, long-standing cracks in the feet (heel fissures) that are painful and not improving with regular creams like Moisturex, Krack Cream, and Vaseline need more intensive care, so your mother should keep her feet clean, avoid walking barefoot, and use thick, urea- or salicylic acid?based foot creams regularly (especially at night) followed by wearing socks to lock in moisture, while gently filing thick, hard skin after soaking (but not cutting it), and if cracks are deep, painful, or bleeding, a doctor may prescribe medicated creams, treat any infection, or advise protective dressings. Since this problem has persisted for years with pain, it is best to consult a dermatologist or physician to check for underlying causes like diabetes, fungal infection, or severe dryness and start targeted treatment for proper healing.