blockage

That would cause an air embolism - a blockage caused by an air bubble in the blood circulation.

Noni was about 2½ years old when she died from a blockage in her intestines that caused severe damage to her colon, according to a Facebook post by the zoo.

A serious concern is that the injection can cause a blockage in a blood vessel that can in turn lead to a blood clot travelling to the lungs – what is known as a pulmonary embolism.

In fact, cleaning the skin does not help to remove blockages of the pores which cause acne, according to the NHS website.

Reports said the blockage was made of human waste, tyres, hair and solidified used cooking oil, among other things.