Tsh is too high. You can try drastically change life style n diet plan for two months. I m a known case of hypothyroidism since  age 36yr now almost 70,  my tsh is 1.64, I m on 100 mcg dose with drastically change life style n diet plan yet. You need 150 mcg one in empty stomach before breakfast for two months. With Shalcal 500 one at night as thyroxine is calcium depleting agent so bones become weak. After two months  you  need follow up with MD physician.

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-According to your query and sign and symptom you want to know about the cause and Treatment of disease as you have mentioned as above as - -Please take consultation for better evaluation and best Treatment as it need complete history of patient as personal and family history. Please follow good life style as • take plenty of fluid and • take less spicy and fatty foods and • take home made food only and do exercise regularly with yoga and meditation and • keep positive attitude to fight any disease and any problem of your life .

It is overt hypothyroidism. Needs to start on medications.

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Can help you, kindly consult and provide detailed history for proper diagnosis and further management

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By diet it is ok