If your thyroid is overactive, you’ll quickly burn calories even if you have a good appetite the result can be unintentional weight loss other symptoms include: fast, irregular heart rate; anxiety. Can thyroid cause rapid weight loss. Therefore, hypothyroidism (underactive thyroid) can cause weight gain your body isn’t burning as much energy, which can lead to a calorie surplus your body isn’t burning as much energy.
can thyroid cause rapid weight loss
