Press the right-arrow key to activate the backlit keyboard. Press the right-arrow key again, still holding down the Function key, to toggle the keyboard through its three illumination modes: full intensity, half intensity and off.
Cysts can be painful and easily infected, so be sure to see your dermatologist if you have one [source: WebMD ]. Sometimes age is a factor. Some skin conditions that cause scalp sores, such as ringworm, primarily affect children [source: Berman ]. Others, such as pemphigus, primarily affect older adults [source: National Institute of Arthritis and Musculoskeletal and Skin Diseases ].
High blood pressure, often asymptomatic, can cause headaches, shortness of breath, nosebleeds, and anxiety. Intracranial hematoma. An intracranial hematoma occurs after a head injury and causes headache, drowsiness, confusion, and more. Lyme disease Lyme disease is a bacterial infection spread through tick bites; symptoms include rash, fever chills, and more.