In most cases a neck cyst will not need treatment. The patient may be advised to check the area from time to time in order to ensure the cyst is not growing. If the cyst is very large and unsightly or is affecting another bodily system or displacing veins or arteries in the neck, surgery may be required to remove the lump. Sometimes a cyst may be the sign of an underlying medical condition, such as a thyroid problem. In this case, the treatment will aim to cure or treat the condition rather than the cyst directly.