Itching can be prevented only to the extent that the underlying cause(s) of the itching sensation can be prevented. For example, careful use of sunscreen products can prevent the itching associated with sunburn. Keeping well hydrated and using moisturizers can prevent the itch associated with dry skin.
brownout (plural brownouts) 1  A period of low alternating current line voltage, causing a reduction in illumination When demand for electricity exceeds the available supply, a brownout occurs. 2  Temporary dimming of vision, usually with a brown hue and accompanied by loss of peripheral vision or tunnel vision. On rising suddenly from her chair she experienced a brownout and had to sit down again quickly. Temporary closing of a fire station, usually due to budget restrictions.
In present day terms it is load shedding. The daily scheduled power cuts we face can be termed as Brown out. Few decades back it is referred to sudden dip in voltages in system. When this happens proportional high currents would be drawn from the transmission lines. Because of this there will be imbalance in the grid and if not properly handled the grid may collapse leading to blackout. Brownout is less severe than blackout.