Depression is classified as a mood disorder. It may be described as feelings of sadness, loss, or anger that interfere with a person's everyday activities. It is…
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.
Persistent depressive disorder, formerly known as dysthymia, is a form of chronic depression. Learn about its symptoms, causes, treatment, and more.
In women, fluctuating hormone levels are a major contributing factor in chronic headaches and menstrual migraines. Learn about causes, treatment, and prevention.
If you live with fibromyalgia, you know that it's a complex disorder with a range of potential causes, treatments, and risk factors. Here's a top-to-bottom look at this…
Bipolar disorder, formerly called manic depression, causes extreme mood shifts ranging from mania to depression. We explain the symptoms, diagnosis, treatment options…
Seasonal affective disorder (SAD), also known as major depressive disorder (MDD) with seasonal pattern, is a form of depression. Discover how your depression may be…
Adjustment disorders are temporary conditions caused when you have trouble coping with a stressful event. There can be psychological and even physical symptoms.
PTSD can affect anyone who has undergone a traumatic event. Read more on how to cope with it.
Psychosis is a serious mental disorder characterized by thinking and emotions that indicate that the person experiencing them has lost contact with reality.
Learn the symptoms of IBS, what can trigger them, adjustments you can make to ease them, and what can treat them.
Premenstrual syndrome causes a wide variety of emotional and physical symptoms. Learn more about it.
Anorexia nervosa is an eating disorder that can result in severe weight loss. Learn more about warning signs and treatment.
Find out what you need to know about dementia, and learn how it's different from ordinary aging.
Alcohol use disorder, or alcoholism, is an addiction to alcohol. Here's what you need to know about symptoms, treatment, prevention, and more.
The thyroid gland produces a hormone that controls how your cells use energy (metabolize). Hypothyroidism occurs when the body doesn't produce enough. Untreated, it can…
Whiplash occurs when a person's head moves backward and then forward very suddenly with great force. This injury is most common following a car collision.
Obesity is an epidemic in the U.S. This condition puts people at a higher risk for serious diseases, such as type 2 diabetes, heart disease, and cancer.
Hypopituitarism occurs when your pituitary gland in your brain is not releasing one or more of the eight hormones it should be releasing.
A stroke is a medical emergency that requires immediate medical care. Learn about the signs of a stroke and what to do.
This feature is for informational purposes only and should not be used to diagnose. Please consult a healthcare professional if you have health concerns.