Itch Flashcards
(9 cards)
What are secondary signs of itch?
excoriations
lichenification
papules or nodules
What are causes of itchy lesions?
scabies urticaria atopic eczema dermatitis herpetiformis lichen Planus
What are systemic causes of itch?
Low iron Lymphoma Hypo/hyperthyroidism Liver disease CKD Malignancy Drugs
What causes pruritus in scabies?
delayed type IV hypersensitivity reaction to mites/eggs after about 30 days of initial inf
How does scabies typically present?
widespread itch
linear burrows on Side of fingers, interdigital webs and flexor aspects of the wrist
What is the treatment of scabies?
- permethrin 5%
- malathion 0.5%
- avoid close physical contact w others
- wash clothes, bedding etc on first day of rx to kill of mites
When applying permethrin/malathion - cover all the skin
How does scabies present in children ?
same as adults but face and scalp can be affected
What is crusted scabies? what is rx?
Seen in immunosuppressed, esp HIV
Crusted skin teeming with hundreds of organisms
Rx: ivermectin and isolation
What is important to inform people who are having treatment for scabies?
Itch can persist after giving initial rx as mite burrows and leaves debris deep
