There are strong associations between exposure to child abuse in all its forms and higher rates of many chronic conditions. The strongest evidence comes from the Adverse Childhood Experiences (ACE's) series of studies which show correlations between exposure to abuse or neglect and higher rates in adulthood of chronic conditions, high-risk health behaviors and shortened lifespan. A recent publication, Hidden Costs in Health Care: The Economic Impact of Violence and Abuse, makes the case that such exposure represents a serious and costly public-health issue that should be addressed by the healthcare system. Child abuse is a major life stressor that has consequences involving the mental health of an adult but, the majority of studies examining the negative consequences of abuse have been focused on adolescences and young adults. It has been identified that childhood sexual abuse is a risk factor for the development of substance-related problems during adolescence and adulthood. The early experiences of child abuse can trigger the development of an internalizing disorder, such as anxiety and depression. For example, adults with a history of some form of child abuse, whether sexual abuse, physical abuse, or neglect, have more chances of developing depression then an adult who has never been abused. Child abuse can also cause problems with the neurodevelopment of a child. Research shows that abused children often develop deficits with language, deregulation of mood, behaviour and also social/emotional disturbances. These risks are elevated when child abuse is combined with traumatic events and/or fetal alcohol exposure.
Psychological effects
Children who have a history of neglect or physical abuse are at risk of developing psychiatric problems, or a disorganized attachment style. Disorganized attachment is associated with a number of developmental problems, including dissociative symptoms, as well as anxiety, depressive, and acting out symptoms. A study by Dante Cicchetti found that 80% of abused and maltreated infants exhibited symptoms of disorganized attachment. When some of these children become parents, especially if they suffer from posttraumatic stress disorder (PTSD), dissociative symptoms, and other sequelae of child abuse, they may encounter difficulty when faced with their infant and young children's needs and normative distress, which may in turn lead to adverse consequences for their child's social-emotional development. Despite these potential difficulties, psychosocial intervention can be effective, at least in some cases, in changing the ways maltreated parents think about their young children.
Victims of childhood abuse, it is claimed, also suffer from different types of physical health problems later in life. Some reportedly suffer from some type of chronic head, abdominal, pelvic, or muscular pain with no identifiable reason. Even though the majority of childhood abuse victims know or believe that their abuse is, or can be, the cause of different health problems in their adult life, for the great majority their abuse was not directly associated with those problems, indicating that sufferers were most likely diagnosed with other possible causes for their health problems, instead of their childhood abuse.
The effects of child abuse vary, depending on the type of abuse. A 2006 study found that childhood emotional and sexual abuse were strongly related to adult depressive symptoms, while exposure to verbal abuse and witnessing of domestic violence had a moderately strong association, and physical abuse a moderate one. For depression, experiencing more than two kinds of abuse exerted synergetically stronger symptoms. Sexual abuse was particularly deleterious in its intrafamilial form, for symptoms of depression, anxiety, dissociation, and limbic irritability. Childhood verbal abuse had a stronger association with anger-hostility than any other type of abuse studied, and was second only to emotional abuse in its relationship with dissociative symptoms. More generally, in the case of 23 of the 27 illnesses listed in the questionnaire of a French INSEE survey, some statistically significant correlations were found between repeated illness and family traumas encountered by the child before the age of 18 years. According to Georges Menahem, the French sociologist who found out these correlations by studying health inequalities, these relationships show that inequalities in illness and suffering are not only social. Health inequality also has its origins in the family, where it is associated with the degrees of lasting affective problems (lack of affection, parental discord, the prolonged absence of a parent, or a serious illness affecting either the mother or father) that individuals report having experienced in childhood.
Physical effects
Children who are physically abused are likely to receive bone fractures, particularly rib fractures, and may have a higher risk of developing cancer. Children who experience child abuse & neglect are 59% more likely to be arrested as juveniles, 28% more likely to be arrested as adults, and 30% more likely to commit violent crime.
The immediate physical effects of abuse or neglect can be relatively minor (bruises or cuts) or severe (broken bones, hemorrhage, or even death). In some cases the physical effects are temporary; however, the pain and suffering they cause a child should not be discounted. Meanwhile, the long-term impact of child abuse and neglect on physical health is just beginning to be explored. The long-term effects can be:
Shaken baby syndrome. Shaking a baby is a common form of child abuse that often results in permanent neurological damage (80% of cases) or death (30% of cases). Damage results from intracranial hypertension (increased pressure in the skull) after bleeding in the brain, damage to the spinal cord and neck, and rib or bone fractures (Institute of Neurological Disorders and Stroke, 2007).
Impaired brain development. Child abuse and neglect have been shown, in some cases, to cause important regions of the brain to fail to form or grow properly, resulting in impaired development (De Bellis & Thomas, 2003). These alterations in brain maturation have long-term consequences for cognitive, language, and academic abilities (Watts-English, Fortson, Gibler, Hooper, & De Bellis, 2006). NSCAW found more than three-quarters of foster children between 1 and 2 years of age to be at medium to high risk for problems with brain development, as opposed to less than half of children in a control sample (ACF/OPRE, 2004a).
Poor physical health. Several studies have shown a relationship between various forms of household dysfunction (including childhood abuse) and poor health (Flaherty et al., 2006; Felitti, 2002). Adults who experienced abuse or neglect during childhood are more likely to suffer from physical ailments such as allergies, arthritis, asthma, bronchitis, high blood pressure, and ulcers (Springer, Sheridan, Kuo, & Carnes, 2007).
On the other hand, there are some children who are raised in child abuse, but who manage to do unexpectedly well later in life regarding the preconditions. Such children have been termed dandelion children, as inspired from the way that dandelions seem to prosper irrespective of soil, sun, drought, or rain. Such children (or currently grown-ups) are of high interest in finding factors that mitigate the effects of child abuse.