Conditions list medically reviewed by George Krucik, MD, MBA
If left untreated, HIV can lead to AIDS. AIDS weakens your immune system to the point where it can no longer fight off disease and infection. Learn more.
Concussions can cause serious symptoms that require medical treatment. A concussion is a traumatic brain injury that results in an altered mental state.
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.
Acute stress disorder (ASD) may develop after a traumatic event, and it can last up to one month. Learn about the symptoms of ASD.
Post-concussion syndrome refers to lingering symptoms after a concussion or a mild traumatic brain injury (TBI).
Find out what you need to know about dementia, and learn how it's different from ordinary aging.
PTSD can affect anyone who has undergone a traumatic event. Read more on how to cope with it.
Premenstrual syndrome causes a wide variety of emotional and physical symptoms. Learn more about it.
Nicotine addiction occurs when a person becomes addicted to nicotine, which is a chemical found in tobacco. The addiction is physical, mental, and behavioral.
Insomnia is a sleep disorder. Individuals who suffer from insomnia find it difficult to fall asleep, stay asleep, or both. They don't feel refreshed when they wake up…
People who have GAD worry uncontrollably about common occurrences and situations. GAD is different from normal feelings of anxiousness.
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…
Chronic fatigue syndrome (CFS) is a debilitating disorder characterized by extreme tiredness that can't be explained by an underlying medical condition.
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.
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…
Learn more about anxiety with this overview of anxiety disorders.
In women, fluctuating hormone levels are a major contributing factor in chronic headaches and menstrual migraines. Learn about causes, treatment, and prevention.
This feature is for informational purposes only and should not be used to diagnose. Please consult a healthcare professional if you have health concerns.