A toothache can occur when your tooth has a problem. The sensitivity or pain you feel when drinking water may be a cavity or dental caries. This can bring discomfort and at the same time make your tooth sensitive to extreme-temperature liquids. Advising patients to visit a dentist as soon as possible is beneficial to help manage toothache. They can investigate the tooth and give proper solutions which might involve filling the cavity or other pain relief procedures to improve the situation.