Tooth ache is one of the last signs of tooth decay.
Most of the time the tooth rots away without any sensation, from the first layer (enamel) to the second layer (dentine). Once the bacteria are close to the third layer (pulp), most people experience sensitivity to hot and cold.
Unfortunately, most people don’t understand that once they have toothache, the damage to the tooth is extensive and will need to be either extracted or root filled.
This is why it’s important to have regular check-ups, so the dentist can help you to look after your teeth and stop most dental damage before it happens.