tsh of 150 is very high ,your daughter has hypothyroidism.first step is please get full thyroid function test with anti thyroid antibodies done and medicine needs to be started if it is this high.the normal value is less than 5 .medicine is eltroxin ;it is initiated by your pediatrician or an endocrinologist.
She has hypothyroidism and will need treatment with thyroid hormone replacement. Its a simple pill which she will have to consume daily. You must visit an endocrinologist so that appropriate dose can be given according to her weight.
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