What is the root cause of a child with insecure attachment issues?

Negative experience.: Attachment disorders are the result of negative experience during the early attachment process, which relies upon the interaction of both parent and child. If young children feel repeatedly abandoned, powerless, or uncared for, they learn that they cannot depend on others. Sometimes, the circumstances that cause the attachment problems are unavoidable. But the child is too young to understand.

Early Experience: It is thought the the most common cause of attachment problems has to donwith negative early experiences and possible trauma. This may also occur due to personality difficulties or other emotional problems that are internal to the child.