Final answer:
The first thing to do for a choking person who can't cough out the obstruction is to give back blows and call for help. If back blows don't work, abdominal thrusts can be tried to remove the obstruction.
Step-by-step explanation:
First Aid for Choking
If a person is choking and unable to cough out the obstruction, the first thing you need to do is give back blows. Stand behind the person and deliver firm blows between their shoulder blades using the heel of your hand.
If back blows do not remove the obstruction, the next step is to use abdominal thrusts. Stand behind the person and place your hands just above their navel, with one hand clenched into a fist. Grasp your fist with the other hand and deliver upward thrusts to the abdomen.
Simultaneously, it is essential to call for a trained first aider or emergency medical help to ensure proper assistance is provided.
Learn more about First Aid for Choking