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  • Drugs
  • Ear, Nose, and Throat Disorders
  • Eye Disorders
  • Fundamentals
  • Heart and Blood Vessel Disorders
  • Hormonal and Metabolic Disorders
  • Immune Disorders
  • Infections
  • Injuries and Poisoning
  • Kidney and Urinary Tract Disorders
  • Liver and Gallbladder Disorders
  • Lung and Airway Disorders
  • Men's Health Issues
  • Mental Health Disorders
  • Mouth and Dental Disorders
  • Older People's Health Issues
  • Skin Disorders
  • Special Subjects
  • Women's Health Issues
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  • Emergencies
  • Cardiac Arrest
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  • Bites, Animal
  • Bites, Human
  • Bites, Snake
  • Burns
  • Electrical Injuries
  • Eye, Blunt Injury to
  • Eye, Chemical Burns of
  • Fractures
  • Frostbite
  • Head Injury
  • Heatstroke
  • Hypoithermia
  • Lightning Injuries
  • Shock
  • Sprains and Strains
  • Wounds
Resources
  • About The Merck Manual Home Health Handbook Online Version
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  • The One-Page Merck Manual of Health
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  • Weights and Measures
  • Common Medical Tests
  • Drug Names: Generic and Trade
  • Resources for Help and Information
Index
laldlelhlilolsluly
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Li

Libido (sex drive)

  • female

  • Sexual Dysfunction in Women
    What Affects Sexual Function in Women?Tables
    Low Sexual Desire Disorder
    Spotlight on AgingSidebar

  • male

  • Sexual Dysfunction in Men: Normal Male Sexual Function
    Decreased Libido in Men

  • in erectile dysfunction

  • Erectile Dysfunction (ED): Other disorders

    Lice

    Itching: What the doctor doesTables
    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 and Inflammation: Systemic disorders
    Mouth Sores: Inflammatory disorders
    Lichen Planus

  • nail deformities and

  • Deformities and Discoloration of the Nails: Deformities Associated With Skin Diseases

  • of scalp

  • Some Causes and Features of Hair LossTables

    Lichen sclerosus

    Lichen Sclerosus
    Vaginal Itching: Causes

    Lichen sclerosus et atrophicus

    Penile and Testicular Disorders

    Lichen simplex chronicus (neurodermatitis)

    Itching: What the doctor doesTables
    Dermatitis: Localized Scratch Dermatitis

    Licorice

    Eating Real LicoriceSidebar
    Some Possible Medicinal Herb–Drug InteractionsTables
    Licorice

    Liddle syndrome

    Liddle Syndrome

    Lidocaine

  • for mouth sores

  • Mouth Sores and Inflammation: Topical treatments
    Mouth Sores: Treatment

  • topical

  • Treatment of Pain: Anesthetics
    Mouth Sores and Inflammation: Topical treatments
    Mouth Sores: Treatment

    Life-care communities

    Types of Long-Term CareTables
    Life-Care Communities

    Life-care community

    Settings for Care: Long-Term Care Facilities

    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 in Older People: 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 at the End of Life
    Medical Terms Related to Life-Sustaining TreatmentSidebar

  • physician orders for

  • Do-Not-Resuscitate (DNR) Orders: Physician Orders for Life-Sustaining Treatment (POLST)

    Life-threatening event

  • in infants

  • Apparent Life-Threatening Event (ALTE)

    Lifting technique

    Low Back and Neck Pain: Prevention

    Ligament(s)

    Ligaments

  • age-associated changes in

  • Changes in the Body With Aging: Bones and Joints

  • ankle

  • Lower Leg Injuries: Ankle Sprain
    Spraining an AnkleFigures

  • knee

  • Ligaments of the knee.Figures

  • pain in

  • Musculoskeletal Pain: Causes

  • scapholunate

  • Common Hand InjuriesFigures

    Light

  • depression (seasonal affective disorder) and

  • What Is Seasonal Affective Disorder?Sidebar

  • sensitivity to (photophobia)

  • Other Eye Symptoms: Light Sensitivity

  • sun

  • see Sunlight; Ultraviolet light

    Light-headedness

    Dizziness and Vertigo
    Some Causes and Features of Dizziness and VertigoTables

  • in heart disease

  • Fainting: What the doctor doesTables

  • upon standing

  • Dizziness or Light-Headedness When Standing Up
    Dizziness or Light-Headedness When Standing Up: What the doctor doesTables

    Lightning injury

    Lightning Injuries

    Light therapy

  • for seasonal affective disorder

  • What Is Seasonal Affective Disorder?Sidebar

    Lily of the valley poisoning

    Chemical Food Poisoning: Plant and Shrub Poisoning

    Limb-girdle muscular dystrophy

    Other Forms of Muscular Dystrophy

    Limbic system

    Brain: Cerebrum

    Limbs

    see also Arm; Leg

  • amputated

  • Limb Prosthetics

  • pain after

  • Stump 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

  • Limb Pain
    Limb Pain: What the doctor doesTables

  • severed or constricted

  • Severed or Constricted Limbs or Digits

  • swelling (edema) of

  • Swelling
    Swelling: What the doctor doesTables

    Lindane

    Lice Infestation: Treatment

    Linea alba, of gum

    Color Changes in the MouthSidebar

    Linezolid

    AntibioticsTables

    Lip

    Biology of the Mouth

  • cancer of

  • Cancerous Mouth Growths: Symptoms

  • cleft

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

  • color changes in

  • Lip and Tongue Disorders: Discoloration

  • inflammation of (cheilitis)

  • Lip and Tongue Disorders: Inflammation

  • keratoacanthoma of

  • Mouth Growths: Noncancerous growths
    Noncancerous Mouth Growths

  • sores on

  • Lip and Tongue Disorders: Sores

  • sunlight damage to

  • Lip and Tongue Disorders: Sun Damage

  • swelling of

  • Lip and Tongue 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

    Disorders of Lipid Metabolism
    Other Rare Hereditary Disorders of Lipid MetabolismSidebar

    Lipodystrophy, intestinal (Whipple disease)

    Whipple 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
    Blood Tests*Tables

  • 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
    Blood Tests*Tables

  • 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

  • Family Planning: Oral Contraceptives

  • VLDL

  • Cholesterol Disorders
    Lipoproteins: Lipid CarriersTables

    Liposuction

  • in gynecomastia

  • Breast Disorders in Men: Breast enlargement

    Lip reading

    Management of Hearing Loss: Other Means of Coping With Hearing Loss

    Liquid diet

    Diets: Liquid Diets

    Liquor

    see Alcohol use and abuse

    Lisfranc's fracture-dislocation

    Foot and Ankle Fractures: Metatarsal Fractures

    Listeria monocytogenes infection (listeriosis)

    Listeriosis

  • during pregnancy

  • Infections During Pregnancy

    Listeriosis

    Gastroenteritis: Bacteria

    Lithium

  • in manic-depressive illness

  • Bipolar Disorder (Manic-Depressive Illness): Lithium

  • during pregnancy

  • Some Drugs That Can Cause Problems During Pregnancy*Tables

    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

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

  • alcohol effects on

  • Alcohol: Long-Term Effects

  • in alpha1-antitrypsin deficiency

  • Alpha1-Antitrypsin Deficiency

  • 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

  • Diagnosis of Liver, Gallbladder, and Biliary Disorders: 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
    Blood Vessel Disorders of the Liver

  • cancer of

  • Primary Liver Cancers: Hepatocellular carcinoma

  • cholangiocarcinoma of

  • Primary Liver Cancers: Other Primary Liver Cancers

  • in cholestasis

  • Cholestasis

  • cirrhosis of

  • Cirrhosis
    Alcohol's Toll on the LiverSidebar

  • during pregnancy

  • Liver and Gallbladder Disorders During Pregnancy

  • colorectal cancer spread to

  • Colorectal Cancer: 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 Features* of Liver DiseaseTables
    Some Causes and Features of JaundiceTables

  • drug effects and

  • Effects of Liver Disorders on Drugs

  • information resources on


  • during pregnancy

  • Liver and Gallbladder Disorders During Pregnancy

  • prevention of

  • Selected Strategies for Preventing Some Major Health ProblemsTables

  • in Reye syndrome

  • Reye Syndrome: Symptoms

  • swelling (edema) and

  • Swelling: What the doctor doesTables

  • tests for

  • Diagnosis of Liver, Gallbladder, and Biliary Disorders
    Liver Function TestsSidebar

  • in ulcerative colitis

  • Ulcerative Colitis: Complications

  • drug metabolism by

  • Drug Metabolism
    Drug Elimination: Elimination in the Bile
    Genetic Makeup and Response to Drugs
    Drug Interactions: Alteration
    Effects of Aging on the Liver
    Drugs and the Liver

  • drug-related damage to

  • Some Serious Adverse Drug ReactionsTables
    Acetaminophen Poisoning: Symptoms and Diagnosis

  • in encephalopathy

  • Hepatic Encephalopathy

  • enlargement of

  • in heart disease

  • Diagnosis of Heart and Blood Vessel Disorders

  • 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 ComaTables

  • fatty

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

  • of pregnancy

  • Liver and Gallbladder Disorders During Pregnancy: Fatty liver of pregnancy

  • gonococcal infection of

  • Gonorrhea: Symptoms

  • granulomas of

  • Hepatic Granulomas

  • hemangioma of

  • Hemangiomas of the Liver

  • hepatoblastoma of

  • Primary Liver Cancers: Other Primary Liver Cancers

  • hepatoma of

  • Primary Liver Cancers: Hepatocellular carcinoma

  • infection of

  • see also Hepatitis
    Abdominal Abscesses: Causes and Symptoms
    Hepatitis
    The Hepatitis VirusesTables

  • inflammation of

  • see Hepatitis

  • injury to

  • Liver Injury

  • in jaundice

  • Jaundice
    Some Causes and Features of JaundiceTables

  • medicinal herbs and

  • Medicinal Herbs and the LiverSidebar

  • metastasis to

  • Metastatic Liver Cancer

  • 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

  • Diagnosis of Liver, Gallbladder, and Biliary Disorders
    Liver Function TestsSidebar
    Blood Tests*Tables

  • transplantation of

  • Liver Transplantation

  • in cirrhosis

  • Cirrhosis: Prognosis and Treatment

  • in hepatitis

  • Chronic Hepatitis: Liver Transplantation

  • in liver failure

  • Liver Failure: Treatment

  • in primary sclerosing cholangitis

  • Primary Sclerosing Cholangitis: Prognosis and Treatment

  • tumors of

  • Tumors of the Liver

    Liver fluke infection

    Other ParasitesTables

    Liver spots

    Spotlight on AgingSidebar

    Living alone

  • aging and

  • Life-Changing Events Related to Aging: Changes in Living Arrangements

    Living arrangements

  • changes in

  • Life-Changing Events Related to Aging: Changes in Living Arrangements

    Living will

    Some Legal Terms Related to Health CareSidebar
    Advance Directives: Living Will

    Lizard bites

    Lizard Bites

    laldlelhlilolsluly
    Audio
    Figures
    Photographs
    Pronunciations
    Sidebar
    Tables
    Videos

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