It could be a matter of long term wear and tear on the tooth enamel, a result of applying too much pressure when brushing or using a hard bristle toothbrush or it could be an aftereffect of the grinding and gnashing associated with bruxism, but you don’t have to live with the discomfort of increased tooth sensitivity. Switching to a soft bristle brush, using a sensitivity relief formula toothpaste and limiting carbonated/acidic drinks can work to make you more comfortable. Visit the Deer Run Dentistry website, to tour our office and read the patient reviews posted there. Deer Run Dentistry 8000 E Prentice Ave A5 Greenwood Village, CO 80111 (303) 606-6809 https://deerrundentistry.com/contact-us/ https://maps.google.com/?cid=17309680447894923460 https://local.google.com/place?id=17309680447894923460&use=posts&lpsid=2184273617570757815