Hashimoto’s disease is an autoimmune condition that primarily impacts the thyroid gland. The person’s immune system mistakenly attacks the thyroid, resulting in hypothyroidism, or an ...

Doctors diagnose hypothyroidism using blood tests that measure thyroid hormone levels. The most common test looks at thyroid-stimulating hormone (TSH) and thyroxine (T4). If TSH levels are high but T4 ...