Abscess Tooth<= That is the cause


Like tremors preceding a volcanic eruption, that odor almost always arrives after the abscess flares up or throbs. The pain's caused by a pressure build up. The odor's caused by the release of that pressure, also described as a draining.

Pay close attention after it throbs, that's when you're probably detecting the aroma.



Symptoms of an abscessed tooth

Fever
Pain when chewing
Sensitivity of the teeth to hot or cold
Bitter taste in the mouth
Foul smell
Swollen neck glands
General discomfort, uneasiness, or ill feeling
Redness and swelling of the gums
Swollen area of the upper or lower jaw
An open, draining sore on the side of the gum

[link to www.medicinenet.com]