So I've decided to create the go-to list of the causes of depersonalization to hopefully help some people out
NOTE: This is a list of the causes of depersonalization symptom, not depersonalization disorder. The cause of depersonalization disorder is unknown at this time.
NOTE 2: This list only includes the direct causes of DP, not the causes of the causes of DP. For example, low testosterone can cause depression, and depression can cause DP, so only depression will be included in the list. Example 2: psychological trauma can cause post-traumatic stress disorder, and PTSD can cause DP, so only PTSD will be included in the list.
The causes of depersonalization are divided into 4 parts: Physical causes, Neurological causes, Psychological causes, and Drug use.
Physical (non-neurological) causes:
1) Heavy metal poisoning
2) Vestibular disorders
1) Temporal Lobe Epilepsy
2) Alzheimer's Disease
3) Multiple sclerosis (MS)
4) Amyotrophic Lateral Sclerosis
5) Neuroborreliosis (Lyme disease)
7) Brain tumour
9) Head injury
10) Traumatic brain injury
4) Major depressive disorder
5) Panic/panic attack
6) Panic disorder
7) Bipolar disorder
8)Acute stress disorder
9) Obsessive-compulsive disorder
10) Social anxiety disorder
11) Depersonalization disorder
12) Post-traumatic stress disorder
13) Dissociative identity disorder
15) Borderline personality disorder
16) Schizotypal personality disorder
17) Schizoid personality disorder
18) Sleep deprivation
19) Life-threatening danger
7) Alcohol withdrawal
10) Nitrous oxide
13) Benzodiazepine dependence
14) Benzodiazepine withdrawal syndrome
15) Antidepressant discontinuation syndrome
If you have symptoms of depersonalization or derealization, it is important to
1) Rule out physical causes by having a blood test, urine test, and vestibular test
2) Rule out neurological causes by having an MRI or CT scan (brain scan) and an EEG (brain wave test)
3) Ensure that you did not use any drug prior to having DP/DR symptoms.
After you rule out the physical, neurological, and drug causes, you will have to see a psychologist to do a psychological assessment, as well as a psychiatrist to do a psychiatric interview to find the correct diagnosis.