Heel fissures is the term for cracking of the skin of the heels. This can be a painful condition that can cause bleeding. Open-backed sandals or shoes that allow more slippage around the heel while walking are often culprits that cause heel fissures. Skin conditions, such as eczema and psoriasis , can also lead to heel fissures. The skin thickens as a result of the friction. Wearing proper shoes and the use of deep skin moisturizers and lotions can reduce the dryness associated with the condition and allow the foot to heal.