Well, yes, Graves' disease can be hereditary, but on the other hand, it can also be caused by some reasons. Generally speaking, you should know that Graves' disease is the most common form of hyperthyroidism. And when it occurs, your eyes may look enlarged, because the upper lids are elevated. And also, in some cases, one or both eyes can be bulge. For other symptoms, it can just lead to the swelling of the front of the neck. For the cause, it can be because of overproduction of thyroid hormone by the entire thyroid gland. For the treatments, in my opinion, you may need to go and see the doctor. So that he can just give you some examination. Anyway, it can be serious and dangerous.