Cracked heels are a sign of lack of attention to foot care rather than just overexposure or lack of moisturizing. Medically, cracked heels are also known as heel fissures. Fissures are regular linear cut wounds and mostly affect the surface level which comprises of the epidermis. Sometimes it may get deep into the dermis and become painful. Excessive pressure on the feet pads make the feet want to expand sideways. As the skin, surrounding the sides of the feet are dry they crack and cause cracked heels. Appearances of dry cracked heels also indicate zinc and omega-3 fatty acid deficiency. Some of the causes of cracked heels are dry air, lack of moisture, improper foot care, an unhealthy diet, aging, prolonged standing on hard floors and wearing the wrong types of shoes. Conditions like eczema, psoriasis, corns and calluses, diabetes and thyroid disease may also contribute to the problem. There are several home remedies for cracked heels that you can try to resolve the