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Online Therapists

Photo of William Blackerby, PhD, Psychologist
William Blackerby
Psychologist, PhD
Verified Verified
Knoxville, TN 37923
I have more than 30 years of experience as both a clinical psychologist and a neuropsychologist. As a neuropsychologist I provide assessments and diagnoses for ADHD, Autism, PTSD, Bipolar Disorder, Head Trauma, Dementia, Personality Disorders, and other neurological and emotional diagnoses. As a clinical psychologist, I work with stress/anxiety, depression, ADHD, autism, Bipolar, PTSD, head trauma, dementia and relationship issues and other emotional and behavioral difficulties. I use techniques proven to be helpful and work collaboratively with you to help you improve your life and resolve the issues that brought you to see me.
I have more than 30 years of experience as both a clinical psychologist and a neuropsychologist. As a neuropsychologist I provide assessments and diagnoses for ADHD, Autism, PTSD, Bipolar Disorder, Head Trauma, Dementia, Personality Disorders, and other neurological and emotional diagnoses. As a clinical psychologist, I work with stress/anxiety, depression, ADHD, autism, Bipolar, PTSD, head trauma, dementia and relationship issues and other emotional and behavioral difficulties. I use techniques proven to be helpful and work collaboratively with you to help you improve your life and resolve the issues that brought you to see me.
(865) 205-8992 View (865) 205-8992

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Trauma and PTSD Therapists

When should I seek treatment for trauma?

Not everyone who undergoes trauma needs therapy to heal, but many do. If, after experiencing a traumatic event, you find yourself struggling with symptoms such as nightmares, dissociation, irritability, or emotional numbness—especially if these symptoms last more than a month and are severe enough to interfere with your daily functioning—you may benefit from seeking out therapy with a trauma-informed provider.

How long does trauma therapy take?

Different types of therapy for trauma unfold on different timelines. Prolonged exposure therapy and cognitive processing therapy, for example, each take about three months, while trauma-informed CBT may last anywhere from 8 to 25 sessions. Other approaches, especially those that are less structured or that incorporate elements from multiple modalities, may be more open-ended, though many patients report feeling better within the first few months of treatment.

What happens if trauma is left untreated?

Unaddressed trauma can have serious—even devastating—effects on relationships, career, and day-to-day functioning. Post-Traumatic Stress Disorder (PTSD) can lead people to distrust or lash out at others, making it difficult to maintain intimate relationships; it can also trigger symptoms such as flashbacks or hyperreactivity that can interfere with a person’s ability to function effectively, personally and/or professionally. Some sufferers turn to drugs to find relief. Symptoms may lessen on their own with time, but there is no guarantee that PTSD will resolve on its own.

Can PTSD come back after treatment?

It is possible for PTSD symptoms to recur months or years after successful treatment. This is because, like most mental health disorders, it is not possible to “cure” PTSD, and stressful life events may cause symptoms to recur in even the most resilient individuals. There is no shame in re-experiencing PTSD symptoms nor in returning to therapy when such relapses occur; indeed, many forms of trauma therapy explicitly encourage periodic “maintenance sessions” to reinforce coping skills and ensure that symptoms stay manageable.