Tooth and Mouth Problems

I have suffering from severe pain in mouth and throat just from one side that is right side with swelling. When i saw inside the mouth firstly its unable to open and secondly i saw redness filled like thing yellow on its top. The paon is severe iam unable to eat anything cant open mouth. Pain comes and goes but its severe.

I have some yellowish teeth and also the gap between them a lot. which treatment i need for this problem.

The part of deposition on my tooth came out when I brush in morning leaving the surface of 2 teeth unstable. What to do. I smoke too.

Shooting pain in the cheek, ear & back of the head. Had pain killers. Subsiding for a while

Some 7 to 8 years back, I had root canal done. While doing the procedure, the doctor might have exerted some pressure and the file broke in the root. She never told me about this. Now I have left the city. I started feeling some sensitivity in that tooth. So I went to another dentist to gave the procedure done again. He found out thus and told me. He says it cannot be removed. I want an opinion on it. Can the needle be removed for the root canal? I still have the sensitivity in the tooth.

My third lower molar has abcess and compressing my inferior alveolar canal diagnosed in cbct scan as I experienced persistent nausea feeling slight burning sensation in lower jaw and pain from that tooth as my dentist prescribed me for extraction is the only choice for that tooth and prescribing steroid and neurobion for 10 days....will it solve the solution for my mysterious symptoms...

Does flap surgery comes under cosmetic ? My insurer says it is a OPD procedure and meant for beautification/aesthetic. Please guide.

I have been tooth ache , as wisdom teeth is coming and gum occupy the adjacent tooth which has already decayed .

Myteeth and gum is paining seams that swelling in the upper jaw right side from last tree teeth. Sensitiveness to cold.

My teeth was very ugly and yellow i get some suggestion by you and medicine