Twisting the knee is a common cause of overstretched or torn ligaments of the knee. The knee may give out suddenly when the ACL is torn and there may be a popping sound upon injury. Symptoms of a torn ACL include knee pain, swelling, stiffness, and bruising.
Early symptoms of carbon monoxide poisoning such as headaches, nausea, and fatigue, are often mistaken for the flu because the deadly gas goes undetected in a home. Prolonged exposure can lead to brain damage and even death.
Some appliances like kerosene heaters can cause carbon monoxide poisoning inside your house. Charcoal too gives off that carbon monoxide (CO). If you have a generator, grill, or car, keep it outside of your house, and never run it inside of your house.arbon dioxide another gas formed from carbon and  oxygen, has the formula CO 2.   A gas, â¦ the molecules of which are made up of one carbon atom bonded  with one oxygen atom. Carbon monoxide gas is clear, odorless and  lethal when inhaled in LOW concentration.