Cracked heels, or heel fissures are primarily caused by dry skin and possible vitamin deficiencies such as zinc or omega 3 fatty acids.
If you find yourself with cracked heels, the remedy is rather simple. Firstly, increase your daily intake of zinc and omega 3 fatty acids. Next, take some petroleum jelly and slather it on your feet before you go to bed. Wrap your feet in plastic wrap, then put a pair of socks on. Within a week or so, your feet will begin to improve in their appearance, texture and softness!
There are also some alternative treatments you can try.
Apply the pulp of a ripe banana on the dry or cracked area of the heel. Leave it on for 10 minutes and rinse it clean. Soak the feet in lemon juice for about 10minutes. Apply Petroleum jelly and socks and wash your feet in the morning (the acid from the lemon will help "eat away" the dead skin cells).
A regular application of a mixture of glycerin and rosewater is known to soothe and cure cracked heels. Another result oriented solution is to melt paraffin wax and mix it well with little mustard oil. Apply on the dry or cracked area of the heels. Rinse it off in the morning. A continuous application for 10 to15 days can achieve desirable results. .