Do many people get hypothyroidism?

Hello, the etiology of hypothyroidism is more complicated, primary is more common, followed by pituitary, and others are rare. The cause of hypothyroidism is related to improper diet. Due to improper diet, spleen and stomach damage, insufficient middle qi, abnormal transport and transformation, Shui Gu can not transport and transform, and phlegm is endogenous; Excessive phlegm and dampness can hinder qi movement and damage spleen, thus inducing hypothyroidism. When the defect of thyroid hormone receptor in tissue is caused by congenital reasons, even if the amount of thyroid hormone is not available, thyroid hormone cannot play its role due to the defect of receptor, which leads to hypothyroidism.