When your body suddenly releases a burst of adrenaline—like during a scare or shock—it can make autoimmune thyroid problems worse, even if you don't feel stressed at all.

When your body releases a lot of adrenaline due to stress or other triggers, it might cause your thyroid to flare up—even if you don't feel stressed at all.

Long-term stress might mess with your body’s stress and immune systems in a way that could lead to thyroid problems like Hashimoto’s or Graves’ disease, possibly by causing the immune system to attack the thyroid by mistake.

When people are under long-term stress or feel anxious all the time, it can mess up their thyroid gland's normal function and make thyroid autoimmune diseases like Hashimoto's worse.