The term underweight refers to a human who is considered to be under a healthy weight. "Underweight" means weighing less than what is expected to be a healthy person (underweight = insufficiency of weight). The definition is usually made with reference to the body mass index (BMI). A BMI of under 18.5 is usually referred to as underweight. This medical definition of underweight may differ from other uses of the term, such as those based on attractiveness.

Contents

• 1 Causes
• 2 Problems
• 3 Treatment
  • 3.1 Diet
  • 3.2 Exercise
  • 3.3 Appetite Stimulants
• 4 See also
• 5 References

Causes

The most common cause of a person being underweight is primarily malnutrition caused by the unavailability of adequate food. The effects of primary malnutrition may be amplified by disease; even easily treatable diseases such as diarrhea may lead to death.

Some people are underweight due to genetics; others due to poverty.

Being underweight can sometimes be the result of mental or physical disease, such as hyperthyroidism, cancer, or tuberculosis. People with gastrointestinal or liver problems may be unable to absorb nutrients adequately. People with eating disorders are likely to become underweight.

Adverb

slightly (comparative more slightly, superlative most slightly)

1. Slenderly; delicately.

   He was slightly built, but tall.

2. To a small extent or degree.

   He weighed slightly less than his wife who was a foot shorter.

Synonyms

• (to a small extent or degree): a little, marginally, somewhat

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• King's College Centre for Anxiety Disorders BDD Program
  psychology.iop.kcl.ac.uk
  Information on the centre's treatment programs for this condition. Located in London, England.
• About Our Kids - Body Dysmorphic Disorder Information
  aboutourkids.org
  Provides descriptions of symptoms and treatments, along with brief case examples. Also includes answers to common questions for parents of teens who may have BDD.
• When the Mirror Lies: Body Dysmorphic Disorder
  healthyplace.com
  Personal perspective on BDD and its relationship to eating disorders. Includes description of symptoms and treatment information.