The word "neurasthenia" is a term that has fallen into disuse among psychiatrists in the United States and Australia. It remains in use in the United Kingdom. Where it is used, it covers a wide spectrum of symptoms including the sensation of pain or of numbness in various parts of the body, chronic fatigue, weakness, anxiety, and fainting. Additional findings associated with this term may include rapid intense heartbeat that may be irregular (palpitations, tachycardia); cold, clammy hands and feet; abnormally rapid breathing (hyperventilating); dizziness or faintness; periodic sighing; and/or sweating for no apparent reason.