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 ].
Tension headache Tension headaches, caused by muscle tension, are marked by pain, pressure and tightness around the head. Ear canal infection Symptoms of an ear canal infection include ear pain and itching, decreased hearing, drainage and more. Aseptic meningitis (adult) Aseptic meningitis, or viral meningitis, can cause fever, headaches, neck pain, nausea, and more.