These are frequently called heel fissures and can cause not just discomfort but pain!
They are caused by dry skin, the heel skin thickens, and sometimes callouses can be seen around the heel edge.
The condition can become severe if the cracks become infected. They can bleed and should at that time be treated by either a podiatrist, or if infected, be referred to a doctor if the podiatrist is not an independent prescriber.
