DermNet provides Google Translate, a free machine translation service. Note that this may not provide an exact translation in all languages
Home » Topics A–Z » The differential diagnosis of itchy skin
Author: A/Prof Amanda Oakley, Dermatologist, Hamilton, New Zealand, February 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.
Stages include:
General treatments for itchy skin conditions may include:
Insect bites / papular urticaria
Pompholyx (dyshidrotic eczema)
Mycosis fungoides (T-cell lymphoma)
Transient acantholytic dermatosis / Grover disease
May have secondary lesions due to scratching: erosions, purpura, lichen simplex and secondary infection. Localised itch is often neuropathic/neurogenic. If scalp itchy, look carefully for head lice and their egg cases.
Examine carefully for scabietic burrows.
Systemic disease
See smartphone apps to check your skin.
[Sponsored content]
© 2021 DermNet New Zealand Trust.
DermNet NZ does not provide an online consultation service. If you have any concerns with your skin or its treatment, see a dermatologist for advice.