Poop Sweat and Thyroid Absorption: Dr. Roach Answers Two Health Questions
Dr. Roach explains that sweating around the butt during urge is a form of focal hyperhidrosis caused by parasympathetic activation during defecation, a normal but sometimes location‑specific reaction that can be prominent and rarely associated with fainting; in a separate Q&A, he discusses a patient with a large rise in TSH on Synthroid, noting that coffee, milk, calcium, fiber, and some medications can impair thyroid hormone absorption and that timing and potential GI conditions should be reviewed to optimize replacement therapy.