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Professional
Consumer
MSD Manual
Consumer Version
HEALTH TOPICS
HEALTHY LIVING
SYMPTOMS
EMERGENCIES
RESOURCES
COMMENTARY
ABOUT US
HEALTH TOPICS
HEALTHY LIVING
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Nonspecific Symptoms
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Nonspecific Symptoms
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Fatigue
Causes
Common causes
Less common causes
Evaluation
Warning signs
When to see a doctor
What the doctor does
Testing
Treatment
Essentials for Older People
Key Points
Involuntary Weight Loss
Causes
Evaluation
Warning signs
When to see a doctor
What the doctor does
Testing
Treatment
Essentials for Older People
Key Points