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Various disorders and factors contribute to the development of dementia. Neurodegenerative disorders result in a progressive and irreversible loss of neurons and brain functioning. Currently, there are no cures for these types of disorders. They include:Hispanic man with dementia sitting in a park

Other types of progressive brain disease include:

Other types of dementia can often be halted or even reversed with treatment. For example, normal pressure hydrocephalus, an abnormal buildup of cerebrospinal fluid in the brain, often resolves with treatment.

In addition, certain medical conditions can cause serious memory problems that resemble dementia. These problems should go away once the conditions are treated. These conditions include:

  • Side effects of certain medicines
  • Depression
  • Certain vitamin deficiencies
  • Drinking too much alcohol
  • Blood clots or tumors in the brain
  • Head injury, such as a concussion from a fall or accident
  • Thyroid, kidney, or liver problems

Doctors have identified many other conditions that can cause dementia or dementia-like symptoms. These conditions include:

  • Creutzfeldt-Jakob disease, a rare brain disorder
  • Huntington’s disease, a hereditary disorder caused by a faulty gene
  • Chronic traumatic encephalopathy (CTE), caused by repeated traumatic brain injury
  • Subdural hematoma, bleeding between the brain’s surface and its outer covering

The overlap in symptoms of various dementias can make it hard to get an accurate diagnosis. But a proper diagnosis is important to get the right treatment. Seek help from a neurologist—a doctor who specializes in disorders of the brain and nervous system—or other medical specialist who knows about dementia.

Learn more about dementia from MedlinePlus.

For More Information About Types of Dementia

NIA Alzheimer’s and related Dementias Education and Referral (ADEAR) Center
1-800-438-4380 (toll-free)
adear@nia.nih.gov
www.nia.nih.gov/alzheimers
The National Institute on Aging’s ADEAR Center offers information and free print publications about Alzheimer’s disease and related dementias for families, caregivers, and health professionals. ADEAR Center staff answer telephone, email, and written requests and make referrals to local and national resources.

National Institute of Neurological Disorders and Stroke
1-800-352-9424 (toll-free)
braininfo@ninds.nih.gov
www.ninds.nih.gov

Association for Frontotemporal Degeneration
1-866-507-7222 (toll-free)
www.theaftd.org

Lewy Body Dementia Association
1-404-935-6444
1-800-539-9767 (toll-free LBD Caregiver Link)
www.lbda.org

Alzheimer's Association
1-800-272-3900 (toll-free, 24/7) 
1-866-403-3073 (TTY/toll-free)
info@alz.org
www.alz.org

National Association for Rare Disorders
1-800-999-6673 (toll-free)
www.rarediseases.org


Updated: July 25, 2017

If you are interested in learning more about Alzheimer's & Dementia, please call us at 1-800-438-4380, Mon-Fri, 8:30 am-5:00 pm Eastern Time or send an email to adear@nia.nih.gov