Urticaria Flashcards
1
Q
What is Urticaria?
A
Hives –> Pale to red, well demarcated, transient, pruritic swellings/large wheals involving the dermis
2
Q
Etiology of Urticaria?
A
- IgE mediated
- Complement mediated (Autoimmune)
- Physical (Dermatographism, induced by scratching)
- Idiopathic
3
Q
Common causes of Acute Urticaria?
A
- Infection
- Meds m/c PCN
- Bites (bees/hornets)
- Idiopathic
4
Q
What is Acute Urticaria often associated with?
A
Angioedema
5
Q
How long does Acute Urticaria last?
A
- Individual lesions = <24 hrs
- Rash <6 wks
6
Q
How is Urticaria treated?
A
- Antihistamines!
- Epi
7
Q
How long does Chronic Urticaria last?
A
> 6 wks
8
Q
What is Angioedema?
A
- Acute or chronic hive-like swelling of the dermis, SQ tissue, and mucosa
- Anaphylactic reaction with pain & burning (pruritis usu. absent) -can result in FATAL laryngeal edema
2 Types:
1. Mast cell-mediated (allergic reaction)
2. Bradykinin-mediated (ACE-I induced, hereditary)
9
Q
What are common sites of angioedema?
A
- Lips
- Palms/Soles
- Limbs
- Trunk
- Genitalia
10
Q
How is Angioedema treated?
A
- Epi
- Antihistamines
- Steroids
