What is a way to cure toothache?

No, cure - treatment. You can't cure a toothache, you can only treat the source. Often, the source of pain is decay, which can infect the nerve in a tooth. The pain is from the dying nerve and the buildup of pressure in tooth or surrounding bone. Root canal therapy eliminates the pain by removing the infected nerve (and allowing you to keep your tooth). Don't delay - see your dentist.
See the dentist. If you have a toothache you need to see a dentist. There are many different reasons for toothaches and only a dentist can determine why your tooth hurts. Additionally, only a dentist can solve the problem and fix/heal your tooth. Teeth never repair themselves and it's important to see a dentist right away so he can save the tooth and protect you from infection.
Call a dentist. There are no home remedies or cures for rotten teeth. No magic pills or rinses or mouthwashes. Toothaches need to be treated locally by a dentist, someone who has years of experience treating these conditions. The sooner you call the sooner you will feel better. Please don't delay, the pain may soon be unbearable.

Related Questions

What is a good way to cure a toothache at home, without going to the dentist, due to money problems?

You can't. Dentistry is not a do it yourself task. Call your local dental society.. They may be able to steer you to a low cost clinic in your community. All the best.. Read more...
You really can't . Toothaches can become life threatening infections. Anodynes, like anbesol might give you some relief. So might analgesics like ibuprophen. But there is no substitute for professional care. Read more...
You can't. You can't "fix" what's broken. There's no over-the-counter or do-it-yourself kit. If you have a toothache, you have a damaged tooth. It takes 8-10 years of training after high school to learn how to resolve the problem. Call the dentist. Ask if they have payment plans available. There's no pill, no ointment, no cream, that will fix your problem, and the longer you wait the worse it gets. Read more...