L50.8
DESCRIPTION
Papular urticaria is a hypersensitivity disorder to insect bites, resulting in recurrent and sometimes chronic itchy papules on exposed areas of the body.
Initial lesion is a red papule, which may blister, become excoriated, and then heal with hyperpigmentation.
Usually occur in crops over several months.
Chronic, severe, persistent reactions may be seen in immunocompromised patients, e.g. HIV infection, immunosuppressive therapy, and malnutrition.
GENERAL MEASURES
Reduce exposure to insects by treating pets, using mosquito nets and fumigating household regularly.
Use of insect repellents may be helpful.
Examine carefully for burrows to rule out scabies.
MEDICINE TREATMENT
New inflamed lesions:
- Potent topical corticosteroids, e.g.:
- Betamethasone 0.1%, topical apply daily for 5 days.
For relief of itch and sedation:
- Chlorphenamine, oral, 4 mg at night as needed in severe cases.
REFERRAL
Non-responsive and chronic cases.