It may due to wrong brushing techinique or hidden infection Clinical examination needed

Start lukewarm salt water rinse thrice daily Use an anti sensitivity toothpaste

Hi If the pain arises suddenlyfrom teeth , there must be some underlying conditions like hidden cavities , periodontal issues ... So it must be clinically diagnosed properly with proper dental history , clinical examinations with IOPA radiographs or Digital OPG.Kindly get video consultation or visit your dentist nearby to get proper treatment plan and medications

Sudden tooth pain could be due to some infection in teeth. Need a xray or physical examination may be needed to diagnose properly.

Go for xray to determine the cause of pain. Ketorol dt three times daily

You are using wrong brushing technique might be  with hard toothpaste causing the trouble. So get consultation with dentist. Or if not possible, then you can consult on practo for further information about it. Let me know if, I can help you to find out best solution for it. Thanks!

Sudden teeth pain may be due to any infection inside the tooth or injury to gums by hard tooth brushing

It might be wrong toothbrushing. You should brush your teeth with soft bristle brush and for max 2minutes. Thank you.