Scratching is the natural response to itch (Pruritus) and, by definition, inseparable from it. The act of scratching not only diminishes itch, but it has been found to be rewarding and addictive. The itch-scratch cycle is a complex phenomenon involving sensory, motor and emotional components.
Atopic dermatitis may be caused by genetic predisposition and environmental conditions, including hereditary factors, allergens, and neurogenous (arising from the nervous system, or from some lesion of the nervous system) and immunological factors.
Water is an essential element for our existence as it performs a number of vital functions in the body. It is a key component of the fluid that forms the basis of saliva that helps us to swallow, of synovial fluids that cushion the joints and of the fluids that fill our eyeballs and lubricates our eyes.
Several viral infections have been associated with the provocation or exacerbation of psoriasis such as strep infections.