Conversation: The conversation between human and AI assistant.
[|Human|] I have had teeth infections & swelling in past & have gingivitus. But recently I began experiencing something different - a dull aching, throbbing & metallic taste on left side (top and bottom teeth). The teeth and gums are not swollen or sensitive to touch. Pain is increased after eating & drinking (coffee especially, it seems) - not necessarily hot or cold food/drink. I have amalgam fillings and am wondering about mercury poisoning.
[|AI|]  This could be due marginal breakage of your amalgam filling, which may lead to sensitivity and mild throbbing pain, you may need to take x-ray of the particular tooth and check for any pupal roof damage, which may occurs in long-standing amalgam filling.  The treatment could be either new filling or needs root canal treatment. The history also shows gingivitis, so oral prophylaxis with mouth wash will help u.