What is Thyroid-stimulating hormone (TSH)?

Thyroid-stimulating hormone (TSH) is like a message sent from your brain to tell your thyroid it's time to work.

Imagine your thyroid is like a factory that makes important energy helpers called hormones. Your brain, specifically the pituitary gland, sends out TSH when it notices that these helpers are running low. Think of TSH as a note saying, "Hey thyroid, please make more!"

Your body uses these hormones to keep you warm, strong, and focused. If your thyroid isn’t making enough hormones, the pituitary gland sends more TSH messages to get it going again.

Sometimes, if your thyroid is too busy or too tired, the brain might send fewer TSH messages, like telling the factory, "Slow down a bit."

Imagine you're playing with building blocks. Your thyroid is like a helper who keeps bringing you new blocks so you can build bigger and better structures. If your helper runs out of energy or gets distracted, your brain sends more TSH to get them back on track, just like sending a reminder note!