Carbon monoxide is an odorless, colorless, and tasteless gas that is near impossible to identify without a proper detector. It is caused by fuels not burning completely, including wood, gasoline, coal, propane, natural gas, gasoline, and heating oil.
The cause of lethargy may be suggested by its pattern and accompanying symptoms. If it starts in the morning and lasts all day, it could be due to lack of sleep or depression.
Diarrhea -- frequent, watery stools most often caused by a virus -- in babies and toddlers usually goes away on its own. It's important to watch your child for signs of dehydration and make sure he or she gets enough fluids.