Dry cracked heels without itching or rashes are common. These heels need a little TLC. Start with one of the over-the-counter dry heel ointments that gently dissolve calluses.  Use the ointment on the heel at night with a sock. In the morning, gently exfoliate in the shower with a sand paper foot file.  Use every night for 5-7 nights and then when better use it once per week to keep your heels soft all winter long. If this remedy is not helping after one week, have your dermatologist evaluate for other conditions.