In Engpsh, you can say "toothache" to describe a pain in your tooth. The word "toothache" is a combination of the words "tooth" and "ache," with "tooth" referring to the hard, calcified structures found in the mouth used for biting and chewing, and "ache" referring to a continuous, dull pain.

The cause of a toothache can vary, but common causes include tooth decay, gum disease, a cracked tooth, or a tooth that has been damaged in some other way.

Here are some example sentences using the term "toothache" in context, along with their translations in Chinese:

"I have a terrible toothache. It's been bothering me all day." (我牙痛得厉害。整整一天都没好过。)
"I need to go to the dentist because I have a toothache." (我需要去看牙医，因为我牙痛。)
"I took some over-the-counter pain medication for my toothache, but it doesn't seem to be helping." (我服用了一些非处方止痛药来缓解牙痛，但似乎没有用。)