A high-strung (or "Type-A") personality is one marked by the traits of perfectionism, competitiveness and urgency. Individuals with high-strung personalities may be praised for their ambitious or goal-centered nature, or... More »

Iron poisoning, hemolytic anemia and hemochromatosis are three causes of a high iron level in the blood, notes Lab Tests Online. Iron tests are usually ordered to determine the underlying cause of symptoms such as dizzin... More »

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People who drink excessive amounts of Nyquil or other cough suppressants are usually seeking to experience the effects of dextromethorphan intoxication, explains the National Library of Medicine. The primary effect of de... More »

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Common personality traits of alcoholics include anxiety or fear, perfectionism, self-pity, low self-esteem and shame, according to The Alcoholism Guide. Other common characteristics are feelings of guilt, a low tolerance... More »

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Birth order is thought to have a definitive influence on an individual's personality and other traits. First-born children are generally reliable and structured, while middle-born children tend to be rebellious people pl... More »

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Most minor instances of discrimination result from natural human instincts to feel more comfortable around other people with similar traits. Discrimination can also result from ingrained beliefs in society that people wi... More »

Learned traits are behaviors that result from the influence of one's environment, as opposed to inherent traits, which are passed down automatically in one's DNA. A common learned trait is the use of language. People dev... More »