I think most of us has amalgam in our mouths. Amalgam is used for dental purpose in our teeth to repair drilled holes. While inserted in the mouth the amalgam will leak small quantities of mercury. This is the biggest source of mercury for the human. Approximately 3,8-21 micrograms mercury enter most peoples bodies every day from  their amalgam fillings.  If you have had your tooth repaired with amalgam it will fell very unpleasant if you bite in a piece of aluminum foil. The reason of this is a chemical reaction between the amalgam, saliva and the aluminum. Plenty of sources say that if you are exposed for a high dose of mercury you may experience blushing and excessive perspiration.

http://www.nomercury.org/atsdr.htm
http://www.altcorp.com/dentalinformation/merctoxicity.htm

Common sense tells me that, what it can cause is flushing. I think blushing is connected closer to our feelings, but it may be some connection with mercury also. If you would like to remove your fillings contact a dentist that have the skills and right equipment for this. You also have to clean your body from this heavy metal. Chlorella has been demonstrated to remove heavy metals and other synthetics from the body by actually binding with them so they may be pulled from the bloodstream. However, this result can only be measured if the level of heavy metals in the bloodstream is known before and after a person starts taking chlorella. Chlorella is a type of seaweed that you buy in tablets, capsules or powder and it has a long history of use to for heavy metal poisoning. It has the capacity to bind with heavy metals and flush them out of your body.