The biggest reason so many people suffer from toothaches is because they drink or eat things that can cause pain or discomfort. Cold or hot beverages are the biggest triggers, as are hard eatables such as peanuts. However, according to Brampton dentists what most people do not understand is why such edibles cause pain. What Is It? As strong as they may look, teeth have sensitive nerves. When these nerves are exposed to certain kind of stimuli like cold and hot drinks, they can cause tremendous pain. The sensation is usually shocking and sends pulses of pain all through the jawline. Even though it may last only for a moment, it is a serious problem that should be dealt with. Causes One of the most common reasons for tooth sensitivity is gum disease resulting in recession. When recession takes place, the gums start exposing the nerves by pulling away from the teeth. In many cases, the patient has to avoid any liquid or food that may reach out to these areas.