Splits in the skin about the heel may be both embarrassing and painful. This issue is because of the thick or dry skin, on and round the edges of the heels. The skin on your feet is usually more dry and dehydrated than the skin in other places on the rest of the body most likely because there are no sebaceous glands in the thicker epidermis on the bottom of the feet. Due to this, the skin around the heels can lose flexibility and resilience due to that deficiency of moisture. Because of the stresses of being on the feet, that dry skin can begin to crack and it can lead to unsightly, painful cracked heels which could at times bleed. There are many factors that increase the risk for the cracked heels including higher pressure, increased bodyweight, inappropriate shoes (particularly shoes which are open at the back), genetics, unhygienic problems and poor self-care, and dietary deficiencies.
To avoid cracked heels, always attempt to use properly fitted enclosed footwear that allow your feet to breathe and get away from shoes which are open at the back. It is very important to keep well hydrated by drinking no less than two litres of water daily as that will help. Exfoliate the skin on a regular basis and moisturise every day with a good lotion. If it is more serious, this should probably be done twice daily initially. There are some suggestions that omega 3 and zinc nutritional supplements may also help (however they do need to be used with the other treatments and not on there own). It will also help to avoid too much exposure of the feet to water or damp conditions. It is necessary that you rinse your feet with tepid to warm water rather than very hot water. If these kinds of approaches tend not to help, then visit a qualified podiatrist. They will take away the thicker hard skin and provide further suggestions about how to self manage.