Many possibilities: There are many possible causes of chronic fatigue- chronic infections (bacterial, viral, fungal, parasitic), nutrient deficiencies, toxic exposures, thyroid ; other hormonal problems, sleep disorders, heart disease, cancer, stress, food allergies, depression etc. A "normal" TSH doesn't rule out thyroid problems- check thyroid antibodies ; free t3- see http://bit.Ly/1cjnybx a holistic doc can evaluate.
Answered 6/10/2014
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