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 ].
Mononucleosis is a viral infection causing extreme fatigue, sore throat, fever, rash, muscle aches, and more. Symptoms of an ear canal infection include ear pain and itching, decreased hearing, drainage and more. Viral pharyngitis is a sore throat caused by a virus, and causes throat pain and cold-like symptoms.