Author: Hon A/Prof Amanda Oakley, Dermatologist, Hamilton, New Zealand, May 2016.
Itch is defined by a desire to scratch.
An acute or chronic itchy rash is most often due to dermatitis/eczema. Dermatitis can be primary, or secondary to scratching.
If clinical diagnosis of an itchy skin problem is uncertain, consider performing the following tests:
Skin biopsy for histopathology, and if available, direct immunofluorescence
General treatments for itchy skin conditions may include:
Localised itch is often neuropathic/neurogenic. If scalp itchy, look carefully for head lice and their egg cases.
Examine carefully for scabetic burrows.
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