Ihave really bad headaches all the time so mostly i’m in my room all the time. what are the cause of headaches (i’m assuming my headaches are caused by my neck issues but may be wrong) and what are some ways to stop the pain

“an abused child's thoughts occasionally drift to other, less anxiety-arousing topics; this anxiety reduction thus serves to strengthen 'other' thoughts, while weakening the thoughts about abuse.” a psychologist with which theoretical background would be most likely to offer this quotation as an explanation for the development of dissociative disorders?