Dermatology SOH > Pruritis (itch) > Flashcards

Pruritis (itch) Flashcards

(8 cards)

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1
Q

Itch

A

Unpleasant, poorly localised, non-adapting sensation that provokes the desire to scratch

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2
Q

Chemical mediators

A

Histamine
PGE2
ACh
Serotonin

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3
Q

Causes

A

Pruritoceptive
Neuropathic
Neurogenic
Psychogenic

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4
Q

Pruritoceptive itch

A

Something in skin that triggers itch

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5
Q

Neuropathic itch

A

Damage to central or peripheral nerves causing itch

eg shingles

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6
Q

Neurogenic itch

A

No evident damage in CNS but itch caused by

eg: opiate effects on CNS

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7
Q

Psychogenic itch

A

Psychological causes with no CNS damage

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8
Q

Management of itch

A

Anti-itch treatments are non specific
Sedative anti-histamines
Emollients
Anti-deppressants

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