Pseudobulbar Affect: Causes, Symptoms, and Treatment
Written by Sumiran Racherla, MD. Medically reviewed by Harsha Moole, MD, Internal Medicine. Last reviewed: October 23, 2026.
What kind of doctor treats Pseudobulbar Affect?
A neurologist, a doctor who treats brain and nerve conditions, usually leads care for pseudobulbar affect. A psychiatrist, a doctor who treats mental health, may help tell it apart from depression or anxiety. A direct primary care or concierge doctor can be a first stop for an evaluation and can refer you to a specialist when needed.
What is pseudobulbar affect?
Pseudobulbar affect, often called PBA, is a condition that comes from damage to the brain. It causes sudden outbursts of laughing or crying that a person cannot control. The outbursts do not match how the person really feels.
PBA is also called pathological laughing and crying. It is poorly recognized, so it may be missed or mistaken for something else.
Symptoms
Doctors look for these signs of PBA:
- Sudden bursts of laughing, crying, or other strong emotion that the person cannot control.
- Outbursts that last seconds or minutes, followed by a quick return to the person's usual mood.
- Outbursts that are out of proportion to what set them off, or that do not fit the person's mood.
- Outbursts that cause distress or make daily life harder.
The outbursts are often the same each time. PBA can hurt rehab, work, social life, and relationships. It can also place a heavy load on caregivers.
Causes and who gets it
PBA happens after damage to the brain from an illness or injury. It is especially common in several diseases. These include amyotrophic lateral sclerosis (ALS, a disease that harms nerve cells that control muscles), Parkinson's disease, multiple sclerosis, and dementias such as Alzheimer's disease. It has also been linked to stroke and traumatic brain injury (a blow or jolt that harms the brain).
Experts think the brain loses some control over how emotions are shown. Changes in brain chemicals, such as serotonin and glutamate, may also play a part. Apart from brain or nerve disease, no other risk factors are consistently linked to PBA.
How doctors diagnose it
Doctors do not all agree on one set of rules for diagnosing PBA. This has caused confusion. They usually look for sudden outbursts that are linked to brain damage and differ from the person's usual mood. The outbursts must cause distress or problems in daily life. Another disorder or a drug must not explain them.
PBA is usually not the first symptom. It usually comes with other signs of the brain or nerve condition behind it. If it does not, the doctor does a full work-up, including a health history, a physical exam, and tests for the likely underlying condition.
Doctors also rule out look-alikes. In depression, the mood matches the outbursts and episodes last days or weeks, not seconds or minutes. Seizures can also cause sudden laughing or crying. PBA and depression can occur together, and having one does not rule out the other. A doctor may also use a short questionnaire to screen for PBA. One example is the Center for Neurologic Study-Lability Scale, which patients fill out themselves.
Treatment
Effective treatment is available. The best choice depends on the needs of each person. Antidepressants have long been used to reduce how often outbursts happen and how severe they are. One common type is called an SSRI, short for selective serotonin reuptake inhibitor. Most medicines used for PBA are used off-label. That means they are used in a way the FDA has not approved.
The combination of dextromethorphan and quinidine is FDA approved for PBA. It is sold under the brand name Nuedexta. Quinidine can cause drug interactions. It can also affect the heart's electrical rhythm. Tell your doctor about every medicine you take.
Learning about the condition helps too. Patient and family education is recommended to manage PBA and reduce stigma. Cognitive and behavior therapy, a type of talk therapy, has not been well studied for PBA, so more research is needed.
When to see a doctor
See a doctor if outbursts of laughing or crying cause distress or make daily life harder. A doctor can check whether the outbursts are PBA or something else, such as depression or seizures. Call 911 or go to the emergency room if you faint, have a sudden change in mental state such as confusion, or have sudden dizziness, weakness, or a change in vision.
How a direct primary care or concierge doctor fits in
A direct primary care doctor charges a flat monthly fee instead of billing insurance, while a concierge doctor usually charges more and often works alongside insurance. Either kind of doctor can listen to your concerns, review your medicines, and help coordinate care with a neurologist.
Common questions
Is pseudobulbar affect the same as depression?
No. In depression, the mood matches how the person acts, and episodes last days or weeks. In PBA, outbursts last seconds or minutes and do not match the person's mood. A person can have both conditions.
Which conditions can cause pseudobulbar affect?
Many brain and nerve conditions can. These include ALS, Alzheimer's disease, stroke, multiple sclerosis, Parkinson's disease, and traumatic brain injury.
Can pseudobulbar affect be treated?
Yes. Effective treatment is available, including SSRIs and the FDA approved medicine dextromethorphan with quinidine. The best choice depends on the person.
What other names does pseudobulbar affect have?
It is also called pathological laughing and crying. Other terms used over the years include affective lability and involuntary emotional expression disorder.
Do the outbursts show how the person really feels?
No. The outbursts do not reflect the person's inner emotion. They are a result of damage to the brain.
Sources
- PubMed Central, National Library of Medicine - The epidemiology and pathophysiology of pseudobulbar affect and its association with neurodegeneration
- PubMed Central, National Library of Medicine - Evaluating the safety and efficacy of dextromethorphan/quinidine in the treatment of pseudobulbar affect
Medical Disclaimer
This content is for general educational and informational purposes only and is not medical advice. It is not a substitute for professional medical advice, diagnosis, or treatment, and reading it does not create a doctor-patient relationship. Always seek the advice of your physician or another qualified health provider with any questions about a medical condition, and never disregard or delay seeking professional advice because of something you read here. If you think you may have a medical emergency, call 911 (or your local emergency number) immediately.
