I recently had a toothache caused by a cavity, and I was in horrible pain. I will post some stuff below that will help however these should not be taken as medical advice as I am not a doctor so I am not responsible for anything that may result from these treatments:

Note these treatments below were sent to me by a friend in India via an Ayurvedic Doctor.

Useful Herbs in the Treatment of Toothache

1 Asafetida (Ferula fetida)

Asafetida is an excellent and fast-acting remedy for toothache problems. Its rich mineral and vitamin contents increase the strength of the teeth and enable them to bear the pain.

2 Clove (Syzygium aromaticum)

Clove has the best astringent and antiseptic properties among all teeth remedies. Clove oil reduces the pain greatly and also fights against the germs in cavities. Clove oil is an important ingredient in many toothpastes. Even dentists apply a material with clove oil as a vital ingredient when filling cavities.

3 Onion (Allium cepa)

Onion may give bad odor temporarily, but in the long run it is very beneficial to dental hygiene. Onion can fight against the germs that accumulate on the teeth and hence prevent future problems with the teeth. People chomping on one raw onion a day are protected from toothache, apart from various other health benefits.

Dietary Treatments for Toothache

Since dental problems are due to imbalances of the kapha dosha, it is necessary to bring the kapha back to normal. To do this, the following points must be obeyed: -

- Sweet foods must be strictly avoided. These will increase kapha in the mouth, which will help the breeding of microorganisms. This causes cavities in the mouth, leading to toothache.

- Do not consume chocolates and sugary foods at night. Their particles will remain in the interspaces of the teeth even if you think you have brushed properly.

- Foods that have bitter, pungent and astringent tastes are good for keeping toothaches in check. These foods can kill the microorganisms settled in the cavities.

- Foods that have good vitamin C content are also good for the teeth. Thus amalaki, tomatoes, green leafy vegetables and citrus fruits must be included in the diet.

- Dental hygiene is a must. You must gargle after every meal and also floss before retiring to bed. Use a toothpick to remove any embedded food particles from the cavities.

Ayurvedic Treatments for Toothache

In case of toothache, a paste of several beneficial herbs is prepared. This is used as a tooth powder and used instead of toothpaste.

The Irimedadi taila is also used for application on the teeth. Regular use of this oil solves most dental problems.

In case the toothache is accompanied with gingivitis, then the following medications are prescribed:-
- A decoction of Triphala and Cyprus is used for gargling.

- A mixture of licorice is prepared in ghee and honey. This is applied on the teeth.

- Tablets of guduchi and mauktik kamadugha are prescribed twice a day for fifteen days.

Home Remedies for Toothache

Toothache home remedies and natural cures:

Remedies for Tooth ache using Garlic
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Among the most effective home remedies for toothache is garlic. A clove of garlic with a little rock salt should be placed on the affected tooth. It will relieve the pain and, sometimes, may even cure it. A clove should also be chewed daily in the morning. It will make the cure teeth making it strong and healthy.

Toothache relief using Onion
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Latest research has confirmed the bactericidal properties of onion. If a person consumes one raw onion every day by thorough mastication, he will be protected from host of tooth disorders. Chewing raw onion for three minutes is sufficient to kill all the germs in the mouth. Toothache is often allayed by placing a small piece of onion on the bad tooth or gum.

Remedies for Tooth ache using Lime
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Lime, as a rich source of vitamin C, is useful in maintaining the health of the teeth and other bones of the body. It prevents decay and loosening of the teeth, dental caries, toothache, and bleeding of the gums
Toothache cure using Wheat Grass

The juice of wheat grass acts as an excellent mouthwash for tooth decay and cures toothaches. Wheat grass can be chewed with beneficial results. It draws out toxins from the gums and thus checks bacterial growth.

Toothache cure using Asafoetida
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The use of asafoetida has been found useful in curing toothache. It should be pestled in lemon Juice and slightly heated. A cotton swab should be soaked in this lotion and placed in the cavity of the tooth. It will relieve pain quickly.
Toothache relief using Bay Berry

A paste of the bark of bay berry should be made with vinegar. This paste, applied on the affected tooth, will relieve the toothache. It can also be applied beneficially on the gums for strengthening them.
Toothache home remedy using Clove

Another home remedy for toothache is in the use of clove, which reduces pain. It also helps decrease infection due to its antiseptic properties. Clove oil, applied to a cavity in a decayed tooth, also relieves toothache.
Remedies for Toothache using Pepper

A mixture of a pinch of pepper powder and a quarter teaspoon of common salt is an excellent dentrifice. Its daily use prevents dental cavities, foul breath, bleeding from the gums, painful gums, and toothaches. It cures the increased sensitiveness of the teeth. A pinch of pepper powder mixed with clove oil can be put on the cavities to alleviate the toothache.