During the hyperemetic
phase, patients note their symptoms relieved during their usual bathing and therefore repeat the behavior.
Gestational hyperthyroidism could also be caused by a variant of hCG with increased thyroid stimulating activity which is supported by the finding that hCG fraction containing asialo-carbohydrate chains was significantly increased in hyperemetic
pregnant women with thyrotoxicosis compared to controls.
CHS is characterized by recurrent, hyperemetic episodes in the context of chronic, daily Cannabis use.
The acute, hyperemetic phase is characterized by severe nausea, frequent vomiting, abdominal pain, and compulsive bathing for temporary symptom relief.
With regard to the etiology of the hyperthyroidism in hyperemesis, not all studies show a difference in serum human chorionic gonadotropin (hCG) concentration between those hyperemetic
subjects with hyperthyroidism and those without (6).