Choking is categorized into two types:
It occurs when an object enters into the windpipe and blocks the air flow completely. It might create a wheezing sound as the victim is unable to throw an object from his mouth. It needs assistance to expel the object by applying force on the abdomen (abdominal thrusts). In case of pregnant women, chest thrust is recommended.
It is the partial obstruction of airways. A normal cough can help in expelling the object from the mouth. Make sure that the casualty will cough enough to throw out the object.