EMDR therapy can be harmful when it is used without proper training and supervision by a qualified mental health professional. It can be dangerous to use EMDR techniques if the person has unresolved trauma, or if they are in an emotionally vulnerable state at the time of treatment.
Additionally, EMDR may not be appropriate for treating certain mental health conditions such as psychosis or bipolar disorder. If you have any of these conditions, make sure to speak with your doctor before starting EMDR therapy.
Unqualified practitioners who try to use EMDR techniques could cause further harm to the patient by exacerbating psychological symptoms or even triggering flashbacks and other traumatic responses. Therefore, it is essential that only properly trained professionals perform this treatment.