For the adult decrease or loss of hearing very serious problem. But loss of hearing at the small child is much more dangerous. There is a lot of reasons at this phenomenon. At the first signs of relative deafness or deafness at the child it is necessary to visit the children's otolaryngologist.
Children learn to talk, imitating adults therefore normal hearing – an indispensable condition of good psycho-speech development of the child. The kid who badly hears or does not hear absolutely, as a rule, lags behind in intellectual development peers. To such child difficulties in communication are inevitable, it is heavy to it to study at usual school. Deafness without treatment at early age can lead to dumbness and disability.
There are two types of deafness: congenital and acquired. The congenital form is when formation of organs of hearing at a germ is broken. This form of deafness is subdivided into hereditary and not hereditary. The acquired deafness is consequences of injury of organs of hearing by various adverse effects. Injuries of ears and a brain, a tumor, noise injuries can be the reasons for the acquired relative deafness. Also loss of hearing at children's age is promoted by various diseases. Adenoidny vegetations, tonsillitis, hypertrophic back rhinitis, measles, scarlet fever, etc. For example, at scarlet fever the inflammatory process of a throat easily passes to a middle ear and causes dangerous, often irreversible consequences.
The reason of a congenital not hereditary form of deafness – injury of auditory organs of a germ. Generally this deafness a consequence of impact on a fruit during pregnancy of various infections and viruses (syphilis, a rubella, a cytomegalic inclusion disease). This deafness is not descended. A half of all cases of deafness at children are the share of hereditary forms. Failures in genes which bear information on development of organs of hearing of a germ are the reasons of congenital hereditary relative deafness. Often these failures are available in organisms of parents, the kid only inherits them. Hereditary deafness passes from father to son.