=====Thyrotoxicosis=====
endogenous or exogenous source of TSH.
==Endogenous:==
  *Grave's disease
  *Toxic multinodular goiter
  *Toxic adenoma
  *TSH-producing adenoma or pituitary adenoma
  *HCG-mediated (gestational) hyperthyroidism 
  *Thyroiditis
  *Drug-induced eg. Amiodarone, iodine contrast

==Exogenous:==
  *Factitious hyperthyroidism
  *Excessive replacement therapy with levothyroxine

[[https://www.ncbi.nlm.nih.gov/books/NBK482216/Thyrotoxicosis review 2022]]