Can you advise for annoying tooth sensitivity?

Determine the cause: Once the cause is determined, then you will be advised on how to alleviate the problem. Could be a cavity, a loose filling, a cracked tooth, gum recession, etc. Can't possibly tell over the internet. Call a local dentist for an appointment.

Sensitive teeth: There are many causes for sensitive teeth like tooth decay, brushing too hard, receding gums, gingivitis and grinding or clenching your teeth, acid erosion (e.g. lemon, soda) could also be one of the causes. Sensodyne toothpaste for sensitive teeth that will protect your teeth, keep them healthy and strong. Ask your dentist for more information and get a dental examination..