If an ultrasound has confirmed a diagnosis of a thyroid cyst, it's important to manage iodine intake in your diet. You should not consume too much iodine, but also not completely avoid it; a normal, regular diet is sufficient.

Secondly, it is important to monitor any changes in the size of the thyroid cyst. Regular ultrasound checks and self-examination can help observe if there's any rapid increase in size locally. If the cyst grows significantly and is accompanied by pain, it might indicate the risk of bleeding within the cyst. Normally, do not massage the thyroid cyst, as massaging will not have any beneficial effects.