Constant tooth sensitivity and decay can have various causes, and it's important to consult a dentist for a proper evaluation and diagnosis. Here are a few potential reasons for your symptoms: Tooth decay: Persistent tooth decay can cause sensitivity and a sensation of grinding. It may be necessary to address the decayed areas with fillings or other dental treatments to prevent further damage. Teeth grinding (bruxism): Grinding or clenching your teeth, especially during sleep, can lead to tooth sensitivity and wear. A dentist may recommend a mouthguard or other appliances to protect your teeth and alleviate the grinding habit. Gum recession: Receding gums expose the sensitive root surfaces of the teeth, leading to increased sensitivity. Proper oral hygiene, including gentle brushing and regular dental cleanings, can help manage gum recession. Acidic diet or reflux: Consuming acidic foods and beverages or experiencing acid reflux can erode tooth enamel, making teeth more sensitive and prone to decay. Avoiding acidic substances and managing reflux symptoms can help protect your teeth. Dental procedures or trauma: Previous dental treatments or trauma to the teeth can cause sensitivity and may require further evaluation or treatment by a dentist. It's crucial to schedule an appointment with a dentist who can examine your teeth, review your dental history, and perform any necessary tests or X-rays. They will be able to provide an accurate diagnosis and recommend appropriate treatment options to address your specific concerns. Maintaining good oral hygiene practices, such as regular brushing, flossing, and dental check-ups, is also important for maintaining dental health.

Do attach pictures for better suggestion . As you mentioned that you grind your teeth , because of the grinding enamel is tend to erode , leaving the teeth more susceptible to dentin exposure . This causes sensation or sensitivity .

Lower anteriot teeth are smallest in whole mouth and compared to other teeth have less enamel and dentin thickness + many times due to improper brushing or eating habits may get damaged earlier in life, so they may become sensitive to heat, cold or any shock or even vibrations. check if any gum issues like gingivitis or gum recession is there or not.

Hello Plz attach pictures

Hi Please attach a pic for a better suggestion