The hormone disorder hypothyroidism can be caused by many conditions, says Marla Ahlgrimm. One of these is Graves’ disease.
According to Marla Ahlgrimm, when you have Graves’ disease, your thyroid gland becomes vulnerable to attacks by your immune system. Your body is then forced to make more thyroid hormones, and certain functions speed up. Around 90% of all cases of hyperthyroidism are caused by Graves’ disease, which is most common in women aged 30 and older.