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.
Environmental Allergens. Nearly any common environmental allergen can cause hives to appear on a toddler's skin. Many are not even true allergens, like pollens or insect bites. Some toddlers have sensitive skin during their early years and develop hives from detergents, personal care products and fragrance products.nvironmental Allergens. Nearly any common environmental allergen can cause hives to appear on a toddler's skin. Many are not even true allergens, like pollens or insect bites. Some toddlers have sensitive skin during their early years and develop hives from detergents, personal care products and fragrance products.