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Disease

Depression (major depressive disorder)

Depression is a mood disorder that causes a persistent feeling of sadness and loss of interest and can interfere with your daily functioning.
Disease

Pelvic inflammatory disease (PID)

This serious infection of the reproductive organs can cause long-term complications such as infertility and ongoing pain. Know the symptoms and causes.
Disease

Nonallergic rhinitis

Many things can trigger this problem. Learn how to get relief from your runny, stuffy nose.
Disease

Dry eyes

Eyes feeling dry and uncomfortable? Inadequate tear production is a common — and very treatable — eye condition. Find out what causes it and how to relieve symptoms.
Disease

Orthostatic hypotension (postural hypotension)

This form of low blood pressure might cause dizziness, lightheadedness or fainting when rising from sitting or lying down.
Disease

Aphasia

Some conditions, including stroke or head injury, can seriously affect a person's ability to communicate. Learn about this communication disorder and its care.
Disease

Balance problems

Learn about the causes and treatments of conditions that leave you feeling dizzy or unsteady.
Disease

Addison's disease

Learn about this rare but serious condition of the adrenal glands that's treated by replacing hormones the body needs.
Disease

Foot drop

Foot drop is a general term that describes a difficulty in lifting the front part of the foot. It's often caused by compression of a nerve.
Disease

Swollen lymph nodes

Infection from bacteria or viruses most often causes this condition.
Disease

Salmonella infection

This common bacterial infection is spread through contaminated food or water and affects the intestinal tract. Learn more about prevention and treatment.
Disease

Cholera

This dangerous but treatable disease causes diarrhea and dehydration. Learn how to lower your risk.
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