It may be due to dental infection, not cleaning or brushing the teeth regularly , it may be due to accumulation of dirt between the teeth. You can mix it with equal amount of salt and pepper and make a paste with water. Apply this paste on the teeth and keep it for a few minutes. Even if the toothache is reduced, you will get relief after doing it for a few days. Also, mix one teaspoon of salt in a glass of hot water and wash your face. This will cure any infection. At the same time, on the advice of a dentist, take medicine quickly and ask them to brush their teeth with Mediplus paste.