Choking can happen when a food bolus or some sort of solid object blocks the airway. The air cannot come in and out of lungs. The victim will not be able to speak if there’s a complete obstruction.
Young children often swallow small objects that might lead to choking.
If the choking is partial (some air movement is possible), the victim may speak with a muffled voice.
In either case, the rescuer must act fast.
If the victim is able to cough, encourage them to cough violently.
If that is not helping, perform 5 back blows between shoulder blades and abdominal thrusts (Heimlich maneuver) alternating between them.

Heimlich maneuver (Abdominal thrusts)

Image courtesy – Redcross-Canada.

• Kneel down behind the child. Place one arm across the person’s chest for support.

• Make a fist with one hand. Place it slightly above the victim’s navel region.

• Grab the fist with the other hand. Press hard into the abdomen quickly, upwards and backwards — as if you are trying to lift the person up.

• Perform 5 abdominal thrusts

• Repeat these 5+5 until the blockage is dislodged or the victim loses consciousness.

Choking in an unconscious victim

When the child loses consciousness, abandon methods to relieve choking and place the child on a firm flat surface to start CPR immediately.
Begin CPR with one slight modification.
Before every breath (during 30:2 CPR with single rescuer and 15:2 with two rescuers), open the airway and look for any visible object that can be retrieved safely.
If an object is not visible, continue CPR, NEVER perform a blind finger sweep as it might push the object further deep.