Interrupted sleep may be caused by age; lifestyle habits, such as drinking alcohol too close to bedtime; medication side effects; or an underlying condition.
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The Epstein-Barr virus that causes mononucleosis (mono) usually infects people during their childhood or the teenage years. The virus stays with people for life.
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Nonmelanoma skin cancers are unlikely to be life-threatening, but they can cause disfiguration and other problems. The cancers should be removed.
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