Joint and muscle pains, stiffness, lumbago and similar symptoms often appear at an early stage. They can be caused or increased by low availability of the trace element selenium. Nervous heart, sometimes accompanied by a week pulse, sometimes by a hard pulse, creates a feeling of anxiety. You don't sleep well, you wake up stiff and never feel thoroughly rested. As a whole you need more sleep than before, and you are constantly tired.
Some individuals develop pronounced intestinal and stomach disturbances.
Bloating is common and diarrhea can alternate with constipation. From 50 to 200 micrograms mercury from amalgam daily passes the gastrointestinal tract. There is usually irritation where mercury first interacts with tissues. The upper respiratory tract easily becomes chronically inflamed and symptoms in mouth appear. The more poisoned you are, the more serious and chronic your problems become.