During my traveling by plane i got incredibly sharp piercing pain in my goiter. do you know what might have caused that?

Goiter or neck?: Unless you are a physician, you probably can't tell if the pain is related to your thyroid, or to other structures in your neck. Thyroid pain is rare but can be caused by a viral infection, an acute bleeding episode into a preexisting nodule, or due to trauma. I would not think that traveling by plane would have anything to do with it.