Allergic reaction is produced when immune system reacts against a foreign substance that is usually not harmful for the body. Anaphylactic reaction is a severe form of allergic reaction. The major difference between both is that symptoms of allergic reaction usually are skin based and less severe whereas anaphylactic reaction involves respiratory and cardiovascualr system too and can be very dangerous. An anaphylactic reaction begins as an allergic reaction but worsens after sometimes.
