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 ].
Cluster headaches, which also are vascular, affect approximately 1 million people per year in the United States. Cluster headaches usually cause pain on one side of the head, occur in groups or âclustersâ and can last for days at a time.ension or muscle contraction headaches often are caused by anxiety and stress. These headaches are characterized by dull pain that begins in the neck or back of the head and squeezes the forehead area. They are characteristically described as having a ârubber bandâ tightened around your head.