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What causes unable to concentrate? 24 possible conditions

You rely on concentration to get through work or school every day. When you’re unable to concentrate, you can’t think clearly, focus on a task, or maintain your attention. Your performance at work or school could be affected if you can’t concentrate. You... Read more

See a list of possible causes in order from the most common to the least.

1

ADHD Basics

Attention deficit hyperactivity disorder is a mental disorder that causes above-normal levels of hyperactive and disruptive behaviors. The cause is unknown but risk factors include genetic predisposition an...

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2

AIDS

There are many symptoms of HIV/AIDS, including persistent skin rashes, night sweats, and mouth sores.

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3

Concussion

This condition is considered a medical emergency. Urgent care may be required.

A concussion is a mild traumatic brain injury. Usually it occurs after an impact to your head or after a whiplash-type injury. A concussion can cause many severe symptoms that affect brain function.

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4

Lead Poisoning

Lead is a toxic metal and a very strong poison. Lead poisoning is serious and sometimes fatal. Discover the causes, treatments, and tips for prevention.

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5

Acute Stress Disorder

Acute stress disorder (ASD) may develop after a traumatic event, and it can last up to one month. Learn about the symptoms of ASD.

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6

Post Concussion Syndrome

Post-concussion syndrome refers to lingering symptoms after a concussion or a mild traumatic brain injury (TBI).

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7

Dementia Overview

Find out what you need to know about dementia, and learn how it's different from ordinary aging.

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8

Post Traumatic Stress Disorder (PTSD)

PTSD can affect anyone who has undergone a traumatic event. Read more on how to cope with it.

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9

Nicotine Dependence

Nicotine addiction occurs when a person becomes addicted to nicotine, which is a chemical found in tobacco. The addiction is physical, mental, and behavioral.

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10

Sleeplessness

Sleeplessness, or insomnia, is a serious sleep disorder. It can mean the inability to fall asleep or stay asleep throughout the night, or the tendency to wake too early before having gotten enough sleep.

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11

Generalized Anxiety Disorder

People who suffer from generalized anxiety disorder, or GAD, worry uncontrollably about common occurrences and situations. The condition may also be called chronic anxiety neurosis.GAD is different than normal feeling...

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12

Delirium

This condition is considered a medical emergency. Urgent care may be required.

Delirium is an abrupt change in the brain that causes mental confusion and emotional disruption. It makes it difficult to think, remember, sleep, pay attention, and more. You might experience the condition durin...

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13

PMS (Premenstrual Syndrome)

Premenstrual syndrome causes a wide variety of emotional and physical symptoms. Learn more about it.

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14

CFS (Chronic Fatigue Syndrome)

Chronic fatigue syndrome (CFS) is a debilitating disorder characterized by extreme tiredness that can't be explained by an underlying medical condition.

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15

Multiple Sclerosis Overview

The things you've wanted to know about MS are all in one place. Learn more about symptoms, treatment, and lifestyle management.

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16

Bipolar Disorder

Bipolar disorder is a mental illness marked by extreme shifts in mood ranging from mania to depression. It is also called bipolar disease or manic depression.

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17

Migraine with Aura

Migraine is a disorder characterized by repeated attacks of severe headache. Symptoms include throbbing or pulsating pain, usually on only one side of the head, and can last between four hours and three days.

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18

Alcoholic Liver Disease

Damage to the liver from excessive drinking can lead to ALD. Years of alcohol abuse cause the liver to become inflamed and swollen. This damage can also cause scarring known as cirrhosis. Cirrhosis is the final stage o...

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19

Anxiety

Learn more about anxiety with this overview of anxiety disorders.

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20

Dysthymia

Persistent depressive disorder, formerly known as dysthymia, is a form of chronic depression. Learn about its symptoms, causes, treatment, and more.

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This feature is for informational purposes only and should not be used to diagnose.
Please consult a healthcare professional if you have health concerns.
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