This is usually associated with pathological phenomena: a violation of metabolic processes, a violation of the normal functioning of the skin.
With the pathological functioning of the immune system, a number of pathological processes in the body can also occur, which lead to a violation of the integrity of the skin. First of all, the heels suffer, since they are the main burden on them. At the majority of people at distribution of weight, the basic part of it is necessary on heels. Also, often cracks are formed in disorders of nervous regulation, changes in the hormonal background.
Cracks can appear with stress, neuropsychic overstrain, with insufficient nutrition, especially vitamin deficiency. First of all, the skin condition is affected by the lack of vitamins of group B. Vitamin A, E, which normalize metabolic processes in the body, remove toxins, free radicals, positively affects the skin condition.
It should be noted that most often cracks appear in children during the transition period: during the period of adaptation to school, during adolescence. At this time the body experiences special increased loads, therefore it needs additional protection, new difficulties arise.
Often stresses cause children to develop various skin conditions. For example, often in children, cracks occur after a strong shock: the loss of a favorite toy, the death of an animal, the divorce of parents. In this case, the normal functioning of the skin is disrupted, it becomes dry, flaky. After this, in the absence of adequate treatment, the skin may begin to crack.
For other reasons for the appearance of cracks in the heels of children, read this article.