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Disease

Insomnia

This disorder can make it hard to fall asleep, hard to stay asleep or both, even though you have the chance for enough sleep. It can drain your energy.
Disease

Amenorrhea

Absence of menstruation (amenorrhea) may be linked to an underlying, treatable problem. Learn about amenorrhea causes and when to seek help.
Disease

Ectopic pregnancy

Ectopic pregnancy occurs outside the uterus, threatening the mother's life. It can't continue normally. But swift treatment can prevent deadly blood loss.
Disease

Low sperm count

This health concern can make it challenging to start a pregnancy. Learn about possible causes and treatment.
Disease

Tooth abscess

A bacterial infection at the tip of the tooth root usually occurs from an untreated dental cavity, an injury or prior dental work.
Disease

Creutzfeldt-Jakob disease

Learn what can put someone at risk of developing this rare brain disorder that causes dementia.
Disease

Multiple sclerosis

This nervous system condition causes a range of symptoms. While there's no cure, it's possible to have long periods of remission.
Disease

Hypothyroidism (underactive thyroid)

Understand what happens when your thyroid is underactive and learn about treatment for this condition.
Disease

Hypoglycemia

Low blood sugar can cause uncomfortable symptoms, such as dizziness and confusion, and can quickly become serious if left untreated.
Disease

Keratitis

An inflamed, red eye can be a minor nuisance — but sometimes it means a more serious problem. Find out about symptoms, treatment and prevention for this potentially dangerous eye condition.
Disease

Lymphedema

Damaged or removed lymph nodes can affect how lymph fluid drains. Fluid buildup leads to swelling. Treatments include compression and massage.
Disease

Paraneoplastic syndromes of the nervous system

This group of conditions affects people who have cancer and occurs when parts of the immune system attack parts of the nervous system.
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