It is an oral compulsivehabit. It is sometimes described as a parafunctional activity, the common use of the mouth for an activity other than speaking, eating, or drinking.
According pathological grooming, and these changes described in the American Psychiatric Association’s DSM, short for Diagnostic and Statistical Manual of Mental Disorders. A new version is coming out early next year, and it puts pathological grooming in the same category as another disorder is obsessive compulsive disorder, or OCD.
Nail biting is very common, especially amongst children. Less innocent forms of nails biting are considered an impulse control disorder in the DSM-IV-R and are classified under obsessive-compulsive and related disorders in the DSM-5. The ICD-10 classifies the practice as “other specified behavioral and emotional disorders with onset usually occurring in childhood and adolescence”. However, not all nail biting is pathological, and the difference between harmful obsession and normal behavior is not always clear.
SIGN AND SYMPTOMS:-
Nail biting usually leads to deleterious effects in fingers, but also mouth and more generally the digestive system. These consequences are directly derived from the physical damage of biting or from the hands becoming an infection vector. Moreover, it can also have a social impact.
The ten fingernails are usually equally bitten to approximately the same degree. Biting nails can lead to broken skin on the cuticle. When cuticles are improperly removed, they are susceptible to microbial and viral infections such as paronychia. Saliva may then redden and infect the skin In rare cases, fingernails may become severely deformed after years of nail biting due to the destruction of the nail bed.
Nail biting may have an association with oral problems, such as gingival injury, and malocclusion of the anterior teeth. It can also transfer pinworms or bacteria buried under the surface of the nail from the anus region to the mouth. If the bitten-off nails are swallowed, stomach problems can occasionally develop.
Nail-biting can be a source of guilt and shame feelings in the nail biter, a reduced quality of life, and increased stigmatization in the inner family circles or at a more societal level
AMMONIUM BROM:- Irritable feeling under the fingernails relieved by bitting them.
ARUM TRIPHYLUUM:- Biting of fingernails till they bleed.
HYOSCYMUS:- Foam in the mouth of children who cry at night without waking up. Nail biting.
NATRIUM MUR:- Nail biting in children.
SANICULA AQUA:- Usefull for children suffering from enuresis and weakness.