Respiratory tract<unk>  (in swallowing) happens when a foreign body blocks the airway. This obstruction can be located in the pharynx, the larynx, or the trachea. The blockage is often partial (insufficient air passes through to the lungs), but it can be complete (when the airflow is totally blocked). Foods that pose a high risk of<unk>  include hot dogs, hard candy, nuts, seeds, whole grapes, raw carrots, apples, popcorn, peanut butter, marshmallows, chewing gum, and sausages. Among children, the most common causes of<unk>  are food, coins, toys, and balloons. In one study, peanuts were the most common object found in the airway of children evaluated for suspected foreign body aspiration. In a 1984 US study, 29% of<unk>  deaths in children were associated with latex balloons, making them the leading cause of<unk>  deaths among children's products. Small, round non-food objects such as balls, marbles, toys, and toy parts are also associated with a high risk of<unk>  death because of their potential to completely block a child's airway. Children younger than age three are especially at risk of<unk>  because they explore their environment by putting objects in their mouths, and they are still developing the ability to chew food completely. Molar teeth, which come in around 1.5 years of age, are necessary for grinding food. Even after molars are present, children continue to develop the ability to chew food completely and swallow throughout early childhood. A child's airway is smaller in diameter than an adult's airway, which means that smaller objects can cause airway obstruction in children. Infants and young children generate a less-forceful cough than adults, so coughing may not be as effective in relieving airway obstruction. Risk factors of foreign body airway obstruction for people of any age include the use of alcohol or sedatives, procedures involving the oral cavity or pharynx, oral appliances, or medical conditions that cause difficulty swallowing or impair the cough reflex; conditions that can cause difficulty swallowing and/or impaired coughing include neurological conditions such as strokes, Alzheimer's disease, or Parkinson's disease. In older adults, risk factors also include living alone, wearing dentures, and having difficulty swallowing. Children with neuromuscular disorders, developmental delay, traumatic brain injury, and other conditions that affect swallowing are at an increased risk of<unk> . Children and adults with neurological, cognitive, or psychiatric disorders may experience a delay in diagnosis because there may not be a known history of a foreign body entering the airway.<unk>  on food is only one type of airway obstruction; others include blockage due to tumors, swelling of the airway tissues, and compression of the laryngopharynx, larynx, or vertebrate trachea in strangulation.
Choking
Snuff 
Hajj Cough
Oil pulling
Soiling
Bursting
Creamy snuff
Dipping tobacco