when you uhhh when you ummm when uhhhh

Carbon monoxide is a poisonous gas that can make you seriously ill if you breathe it in. Carbon monoxide can be made by fires and appliances that burn gas, wood, oil or coal.

Carbon monoxide gas is colourless and does not smell, so you cannot tell if it is around you.

Symptoms of carbon monoxide poisoning include:

headache
dizziness
feeling sick or being sick
feeling weak
confusion
chest and muscle pain
shortness of breath

The symptoms may come and go. They may get worse when you spend time in an affected room or building and get better when you leave or go outside.