These studies illustrate that the normal urination of asymptomatic people varies widely with fluid intake, age, gender, and race. Nevertheless, the fact that 95% of femal and male subjects respectively voided fewer than 13 times and 12 times is applicable to this answering.
1 Medical causes â unrelenting exhaustion may be a sign of an underlying illness, such as a thyroid disorder, heart disease or diabetes. 2  Lifestyle-related causes â alcohol or drugs or lack of regular exercise can lead to feelings of fatigue.  Workplace-related causes â workplace stress can lead to feelings of fatigue.
However, in about a third of patients the cause is not found and the diagnosis is not known. There are numerous causes of fatigue symptoms. Examples of some treatable causes of fatigue include anemia, diabetes,thyroid disease, heart disease, COPD and sleep disorders (Table). Long lasting complaints of fatigue do not equate to chronic fatigue syndrome.