😢 Low TSH numbers don’t mean everything is fine. As a matter of fact, low TSH is just as serious as high TSH. Low TSH (under 1.8) usually means 1. A problem with the pituitary gland 2. Too much medication causing a pituitary problem If your TSH is low, make sure to check for underlying causes of low pituitary function: Stress due to Lifestyle Inflammation Underlying infections Toxins Too much Thyroid medication can also shut down the HPTA axis leaving you with low TSH, anxiety, depression, fati