Hashimoto's disease can cause your body to produce too little thyroid hormone. Find out more about its causes, symptoms and treatment.
Hypothyroidism (underactive thyroid) is when thyroid gland doesn't make enough thyroid hormone. See symptoms, diagnosis and treatment options here.
Your thyroid gland sits in the front of your neck and helps control your metabolism. Read about the different thyroid hormones and thyroid problems.
If your thyroid becomes overactive (hyperthyroidism) or underactive (hypothyroidism), you may experience a range of health problems — learn more here.
Goitre is a swelling at the base of your neck. It's caused by an enlarged thyroid gland. Find out more about causes, symptoms and treatments here.