If The Crown was 27 Dresses, Elizabeth would be Katherine Heigl's character: high-strung, martyr complex, unable to relinquish control, stickler for the rules at all costs. Margaret's the fun sister played by Malin Akerman: a bit irresponsible, flirty, feisty, and determined to be the life of the party.
Although cassia oil can be a skin irritant, it does have some good properties and this warm exotic oil is more than just a fragrant oil, as it can be used in fever, chills and for supporting the digestive system. Cassia oil has a warm pungent smell.
Quick Answer. According to a Mayo Clinic article appearing on CNN, burps that smell like rotten eggs are caused by hydrogen sulfide gas produced as food passes through the digestive system. Hydrogen sulfide in the gas can make it taste and smell like sulphur or rotten eggs.