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THE MERCK MANUAL MEDICAL LIBRARY: The Merck Manual of Medical Information--Home Edition
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Libido (sex drive)

  • female

  • Sexual Dysfunction
    Decreased Libido

  • male

  • Sexual Dysfunction in Men: Normal Sexual Function
    Decreased Libido

  • in erectile dysfunction

  • Erectile Dysfunction (ED): Symptoms

    Lice

    Lice Infestation
    A Close-up Look at LiceFigures
    Insect Bites

  • rickettsial infections from

  • Some Rickettsial and Related InfectionsTables

  • in traveler

  • Problems at the Destination: Lice and Scabies

    Lichenification

    Medical Names for Marks and Growths on the SkinSidebar

    Lichen planus

    Mouth Sores: Inflammatory disorders
    Lichen Planus

  • nail deformities and

  • Deformities and Discoloration: Deformities Associated With Skin Diseases

    Lichen sclerosus

    Symptoms: Causes

    Lichen simplex chronicus (localized scratch dermatitis)

    Dermatitis: Localized Scratch Dermatitis

    Licorice

    Some Possible Medicinal Herb—Drug Interactions Tables
    Licorice
    Eating Real LicoriceSidebar

    Liddle syndrome

    Liddle Syndrome

    Lidocaine

  • for mouth sores

  • Mouth Sores: Treatment

  • topical

  • Treatment: Anesthetics
    Mouth Sores: Treatment

    Life expectancy

    The Aging Body: Life Expectancy

    Life span

    The Aging Body: Life Expectancy

    Lifestyle

  • aging and

  • Looking for the Fountain of YouthSidebar
    Indirect Influences on Health: Social Relationships

  • healthful

  • Tools of Prevention: Healthful Lifestyle
    Tools of Prevention: Healthful Lifestyle

  • longevity and

  • The Aging Body: Life Expectancy

  • in risk assessment

  • Examples of Risk Factors for Health ProblemsTables

    Life-sustaining treatment

    Treatment Options
    Medical Terms Related to Life-Sustaining TreatmentSidebar

    Lifting technique

    Low Back Pain: Prevention

    Ligament(s)

    Ligaments

  • age-associated changes in

  • Changes in the Body: Bones and Joints

  • pain in

  • Symptoms: Causes

  • scapholunate

  • Common Hand InjuriesFigures

    Light

  • depression (seasonal affective disorder) and

  • What Is Seasonal Affective Disorder?Sidebar

  • sensitivity to (photophobia)

  • Symptoms: Light Sensitivity

  • sun

  • see Sunlight; Ultraviolet light

    Light-headedness

    Dizziness: Causes
    Classifying DizzinessTables

  • in heart disease

  • Symptoms: Light-Headedness and Fainting

    Lightning injury

    Lightning Injuries

    Light therapy

  • for seasonal affective disorder

  • What Is Seasonal Affective Disorder?Sidebar

    Limb-girdle muscular dystrophy

    Other Forms of Muscular Dystrophy

    Limbic system

    Brain: Cerebrum

    Limbs

    see also Arm; Leg

  • amputated

  • Limb Prosthetics

  • pain after

  • Pain

  • artificial

  • Limb Prosthetics
    Types of ProsthesesFigures
    Options for ProsthesesTables

  • birth defects of

  • Bone and Muscle Defects: Limb and Joint Defects

  • movement of

  • during sleep

  • Periodic Limb Movement Disorder and Restless Legs Syndrome

  • pain in

  • Symptoms: Pain in the Limbs

  • severed or constricted

  • Severed or Constricted Limbs or Digits

    Lindane

    Lice Infestation: Treatment

    Linea alba, of gum

    Color Changes in the MouthSidebar

    Linezolid

    AntibioticsTables

    Lip

    Biology of the Mouth

  • cancer of

  • Cancerous Growths: Symptoms

  • cleft

  • Bone and Muscle Defects: Facial Defects
    Cleft Lip and Cleft Palate: Defects of the FaceFigures

  • color changes in

  • Lip Disorders: Discoloration

  • inflammation of (cheilitis)

  • Lip Disorders: Inflammation

  • keratoacanthoma of

  • Noncancerous Growths

  • sores on

  • Lip Disorders: Sores

  • sunlight damage to

  • Lip Disorders: Sun Damage

  • swelling of

  • Lip Disorders: Swelling

    Lipase

    Pancreas
    Acute Pancreatitis: Diagnosis
    Blood Tests Tables

    Lipid

    see Fat; Lipoproteins

    Lipid-lowering drugs

    Dyslipidemia: Treatment
    Lipid-Lowering DrugsTables

  • after menopause

  • Menopause: Other Drugs
    Some Drugs Used to Treat Symptoms and Effects of MenopauseTables

    Lipidoses

    Lipid Metabolism
    Other Rare Hereditary Disorders of Lipid MetabolismSidebar

    Lipodystrophy, intestinal (Whipple's disease)

    Whipple's Disease

    Lipohyalinosis

    Ischemic Stroke: Causes

    Lipoma

    Lipomas

  • small intestine

  • Small Intestine Tumors That Are Noncancerous

  • spinal cord

  • Brain and Spinal Cord Defects: Neural Tube Defects

    Lipoprotein(s)

  • in metabolic syndrome

  • Metabolic Syndrome: Diagnosis

    Lipoprotein lipase deficiency

    Dyslipidemia: Hereditary Dyslipidemias

    Lipoproteins

    Cholesterol Disorders
    Lipoproteins: Lipid CarriersTables

  • after menopause

  • Menopause: After Menopause

  • in atherosclerosis

  • Atherosclerosis: Cholesterol Levels
    Cholesterol Disorders
    Dyslipidemia: Symptoms

  • desirable blood levels of

  • Desirable Lipid Levels in AdultsTables

  • HDL

  • Atherosclerosis: Cholesterol Levels
    Coronary Artery Disease: High Cholesterol Levels
    Cholesterol Disorders
    Lipoproteins: Lipid CarriersTables
    Desirable Lipid Levels in AdultsTables

  • progestin and

  • Menopause: Hormone Therapy

  • high blood levels of

  • Cholesterol Disorders
    Dyslipidemia
    Limiting Fat and Cholesterol in the DietTables
    A Practical Approach to a Low-Cholesterol, Low-Saturated Fat DietTables
    Lipid-Lowering DrugsTables

  • inhibitors of

  • Lipid-Lowering DrugsTables

  • LDL

  • Atherosclerosis: Cholesterol Levels
    Coronary Artery Disease: High Cholesterol Levels
    Cholesterol Disorders
    Lipoproteins: Lipid CarriersTables
    Desirable Lipid Levels in AdultsTables

  • progestin and

  • Menopause: Hormone Therapy

  • lowering of

  • Dyslipidemia: Treatment
    Dyslipidemia: Treatment
    Limiting Fat and Cholesterol in the DietTables
    A Practical Approach to a Low-Cholesterol, Low-Saturated Fat DietTables
    Lipid-Lowering DrugsTables

  • in coronary artery disease prevention

  • Coronary Artery Disease: High Cholesterol Levels

  • oral contraceptive use and

  • Contraception: Oral Contraceptives

  • VLDL

  • Cholesterol Disorders
    Lipoproteins: Lipid CarriersTables

    Liposuction

    Cosmetic SurgerySidebar

  • in gynecomastia

  • Breast Disorders in MenSidebar

    Lip reading

    Hearing Loss and Deafness: Other Means of Coping With Hearing Loss

    Liquid diet

    Diets: Liquid Diets

    Liquor

    see Alcohol use and abuse

    Listeria monocytogenes infection (listeriosis)

    Listeriosis

  • meninges

  • Acute Bacterial Meningitis: Causes

  • during pregnancy

  • Risk Factors That Develop During Pregnancy: Infection

    Listeriosis

    Gastroenteritis: Bacteria

    Lithium

  • in manic-depressive illness

  • Bipolar Disorder (Manic-Depressive Illness): Lithium

  • during pregnancy

  • Some Drugs That Can Cause Problems During PregnancyTables

    Lithotripsy

    Stones in the Urinary Tract: Treatment
    Removing a Stone With Sound WavesFigures

    Liver

    Digestive SystemFigures
    Liver

  • abscess of

  • Abdominal Abscesses: Causes and Symptoms

  • adenoma of

  • Hepatocellular Adenoma

  • age-associated changes in

  • Changes in the Body: Digestive System
    Effects of Aging: Pancreas, Liver, and Gallbladder
    Effects of Aging

  • alcohol effects on

  • Alcohol: Symptoms and Complications

  • angiosarcoma of

  • Primary Liver Cancers: Other Primary Liver Cancers

  • in ascites

  • Ascites

  • biology of

  • View of the Liver and GallbladderFigures
    Liver
    Blood Supply of the LiverFigures

  • biopsy of

  • Biopsy of the Liver
    Chronic Hepatitis: Diagnosis
    Primary Liver Cancers: Diagnosis
    Metastatic Liver Cancer: Diagnosis

  • blood supply of

  • Liver: Blood Supply of the Liver
    Blood Vessel Disorders of the Liver
    Blood Supply of the LiverFigures

  • disorders of

  • Occlusive Peripheral Arterial Disease: Hepatic and Splenic Arteries
    Occlusive Peripheral Arterial Disease: Hepatic and Splenic Arteries
    Blood Vessel Disorders of the Liver

  • cancer of

  • Primary Liver Cancers: Hepatoma

  • cholangiocarcinoma of

  • Primary Liver Cancers: Other Primary Liver Cancers

  • in cholestasis

  • Cholestasis

  • cirrhosis of

  • Cirrhosis
    Alcohol's Toll on the LiverSidebar

  • during pregnancy

  • Risk Factors Present Before Pregnancy: Liver and Gallbladder Disorders

  • colorectal cancer spread to

  • Colorectal Cancer: Prognosis and Treatment

  • copper accumulation in (Wilson's disease)

  • Copper: Wilson's Disease

  • cysts of

  • Tumors of the Liver

  • disease of

  • see also specific diseases

  • cholesterol levels in

  • Dyslipidemia

  • clinical manifestations of

  • Manifestations of Liver Disease
    Some Major Features of Liver Disease Tables

  • information resources on

  • La - Lu

  • during pregnancy

  • Risk Factors Present Before Pregnancy: Liver and Gallbladder Disorders

  • prevention of

  • Selected Strategies for Preventing Some Major Health ProblemsTables

  • in Reye's syndrome

  • What Is Reye's Syndrome?Sidebar

  • tests for

  • Diagnostic Tests for Liver, Gallbladder, and Biliary Disorders
    Liver Function TestsSidebar

  • in ulcerative colitis

  • Ulcerative Colitis: Complications

  • drug metabolism by

  • Metabolism
    Elimination: Elimination in the Bile
    Genetic Makeup
    Drug Interactions: Alteration
    Effects of Aging

  • drug-related damage to

  • Some Serious Adverse Drug Reactions Tables
    Acetaminophen Poisoning: Symptoms and Diagnosis

  • in encephalopathy

  • Hepatic Encephalopathy

  • enlargement of

  • in heart disease

  • Diagnosis: Medical History and Physical Examination

  • heart failure and

  • Congestive Hepatomegaly

  • in myelofibrosis

  • Myelofibrosis: Symptoms, Complications, and Diagnosis

  • in polycythemia

  • Polycythemia Vera: Symptoms and Complications

  • failure of

  • Liver Failure

  • in Budd-Chiari syndrome

  • Budd-Chiari Syndrome

  • coma with

  • Some Causes of Stupor and Coma Tables

  • tremor and

  • Tremor: Asterixis

  • fatty

  • Fatty Liver
    Common Causes of Fatty LiverSidebar
    Alcohol's Toll on the LiverSidebar

  • of pregnancy

  • Risk Factors That Develop During Pregnancy: Fatty Liver of Pregnancy

  • function tests of

  • Blood Tests Tables

  • gonococcal infection of

  • Gonorrhea: Symptoms

  • granulomas of

  • Hepatic Granulomas

  • hemangioma of

  • Hemangioma

  • hepatoblastoma of

  • Primary Liver Cancers: Other Primary Liver Cancers

  • hepatoma of

  • Primary Liver Cancers: Hepatoma

  • infection of

  • see also Hepatitis
    Abdominal Abscesses: Causes and Symptoms
    Hepatitis
    The Hepatitis Viruses Tables

  • inflammation of

  • see Hepatitis

  • in jaundice

  • Jaundice

  • medicinal herbs and

  • Medicinal Herbs and the LiverSidebar

  • metastasis to

  • Metastatic Liver Cancer

  • in polycystic kidney disease

  • Polycystic Kidney Disease (PKD): Symptoms and Complications

  • in portal hypertension

  • Portal Hypertension

  • of premature infant

  • Prematurity: Underdeveloped Digestive Tract and Liver

  • primary biliary cirrhosis of

  • Primary Biliary Cirrhosis

  • primary sclerosing cholangitis of

  • Primary Sclerosing Cholangitis

  • sarcoidosis of

  • Sarcoidosis: Liver and Spleen

  • tests for

  • Diagnostic Tests for Liver, Gallbladder, and Biliary Disorders
    Liver Function TestsSidebar

  • transplantation of

  • Liver Transplantation

  • in cirrhosis

  • Cirrhosis: Prognosis and Treatment

  • in hepatitis

  • Chronic Hepatitis: Liver Transplantation

  • in liver failure

  • Liver Failure: Prognosis and Treatment

  • in primary sclerosing cholangitis

  • Primary Sclerosing Cholangitis: Prognosis and Treatment

  • tumors of

  • Tumors of the Liver

    Liver flap

    Tremor: Asterixis

    Liver fluke infection

    Other ParasitesTables

    Liver spots

    Spotlight on AgingSidebar

    Living will

    Legal Terms Related to Health CareSidebar
    Advance Directives: Living Will

    Lizard bites

    Lizard Bites

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