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If all physical causes have been ruled out (including thyroid, blood glucose metabolism, hormonal and steroidal fluctuations) you may want to consider whether these are physical manifestations of a chemical mood disorder. Although it would require a much more indepth history and evaluation to determine whether this is the case, these symptoms can be seen in depression and/or bipolar disorder. The brain is an organ of the body, and if the neurotransmitters are imbalanced and/or depleted it effects us physically. This has only been understood in the last decade or so, and there are medical professionals that are not always aware that these symptoms can improve with treatment with anti-seizure, mood stabilization, and antidepressants in some cases. There is still stigma that these diagnoses are "in the head" rather than caused by actual physical processes. Besides medication, treatment which can be helpful includes journaling the symptoms experienced daily to assist in determining if there are 'triggers' to the episodes such as menstrual periods, and to help in regulating the schedule (a regular sleep and waking schedule as well as increased sleep can in some cases improve the symptoms).
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