牙疼的很厉害英语说作 "toothache".
来源：toothache 来自英语中 tooth（牙齿）和 ache（疼痛）两个单词的组合。
一些英文例句及其中文翻译：
I have a terrible toothache. 我牙疼得厉害。
The toothache kept me awake all night. 牙痛让我整晚没睡着。
I need to see a dentist because of my toothache. 我因为牙痛需要看牙医。
The pain from my toothache was so bad that I couldn't eat anything. 我的牙痛太痛了，以至于我什么也吃不了。