hello, you can do warm salt water rinses at home. this will give you temporary relief from pain. You need to visit a dentist and get an x-ray done. there might be infection to the roots of the tooth. you need to get it treated.

Hello..it may be gum disease in which pus(sticky material) formed underneath the gums which may be called as abscess.. and the so called white layer is may be calculus... so please visit your dentist as soon as possible so that the underlined infection must be cleared by pus drainage and subsequent supra & sub gingival scaling inorder to prevent the further complications like facial swelling or the infection may spread to surrounding sinus/ear. Untill salt water gorgle may help you a little bit. THANK YOU

Show it asap.. till that time in lukewarm water , put salt and rinse 2-3 times a day.. and plz never brush vigorously..and never brush ur gums with toothbrush..it will cause more harm..don't touch the area with your finger..and show to a dentist as early as possible..

Hello, you need to see a periodontist ASAP.In the meantime rinse your mouth with lukewarm water and salt. Regards Dr Sumanmakam

It looks like periodontal disease with abscess caused due to local irritants in the gums like calculus.