the exact cause of gad is not fully known but a number of factors -- including genetics brain chemistry and environmental stresses -- appear to contribute to its development. genetics : some research suggests that family history plays a part in increasing the likelihood that a person will develop gad. this means that the tendency to develop gad may be passed on in families. brain chemistry : gad has been associated with abnormal levels of certain neurotransmitters in the brain. neurotransmitters are special chemical messengers that help move information from nerve cell to nerve cell. if the neurotransmitters are out of balance messages cannot get through the brain properly. this can alter the way the brain reacts in certain situations leading to anxiety. environmental factors : trauma and stressful events such as abuse the death of a loved one divorce changing jobs or schools may lead to gad. gad also may become worse during periods of stress. the use of and withdrawal from addictive substances including alcohol caffeine and nicotine can also worsen anxiety.
what causes generalized anxiety disorder (gad)?