Crazy as this sounds, sometimes my symptoms appear to be increased when I drive my car and/or refuel, .....I'm sure I sound absolutely insane by now, but I can only describe things as they are. Could it have been that gasoline fumes cause some kind of reaction with the Mercury-Amalgams in my mouth? I know it sounds like total lunacy, but more often than not my symptoms go haywire when I'm around fumes, including prolonged exposure to cigarette smoke.