Splits in the skin around the heel can be both unpleasant and painful. This problem is because of the thick or dry skin, on and around the edges of the heels. The skin on the feet is usually more dry and dehydrated compared to the skin in other places on the rest of the body most likely because there are no oil glands in the thicker epidermis on the bottom of the feet. For that reason, your skin around the heels could lose suppleness and resilience as a result of that insufficient moisture. Due to the stresses of walking, that dried-out skin can start to split and it can result in ugly, painful cracked heels that might sometimes bleed. There are a number of causes that increase the risk for the cracked heels including higher pressure, greater weight, poor fitting shoes (especially shoes that are open up at the back), genetics, unhygienic conditions and inadequate self-care, as well as nutritional inadequacies.
To prevent cracked heels, always attempt to wear well fitted enclosed footwear that enable the feet to breathe and avoid footwear which are open at the back. It is very important to remain well hydrated by consuming at least two litres of water each day as that can help. Exfoliate the skin frequently and moisturise every day with a good ointment. If it is more severe, this probably should be carried out twice a day in the beginning. There are some recommendations that omega-3 and zinc supplements could help (but they do need to be used with all the other solutions and not on there own). It will also help to stay away from excessive exposure of the feet to water or moist conditions. It is necessary that you wash your feet with warm water instead of hot water. If these types of approaches don't help, then see a expert podiatrist. They will get rid of the thicker callused skin and provide additional suggestions about how you can self manage.