Italians live by the rule of 15: 1  Use coffee beans within 15 days of roasting. 2  Use ground coffee within 15 minutes of grinding. 3  Drink coffee within 15 seconds of brewing.
The good news is that teeth (and bones) are able to heal themselves in a process called remineralization. Basically, specialized cells in the center of the tooth are able to regenerate dentin, the layer of tooth just under the enamel, and the enamel can then properly remineralize from the outside.
Lemons contain citric acid which helps to reduce the pain in tooth. Take a slice of lemon and apply it directly to the affected area. Or else you can take some lemon juice and add with it a bit of salt. Drop the mixture into the affected area. It will surely reduce your pain.