Mosquito Bite Itch Relief: What Works, What Doesn’t & When to See a Doctor

Rubbing alcohol is not recommended — it dries and irritates skin, worsening itch and potentially causing contact dermatitis.

Evidence-Based Relief (Tiered)

Tier	Intervention	Mechanism	Evidence
1 (First-line)	Cool compress / ice pack (wrapped) 10 min	Vasoconstriction, numbs nerves	Strong (symptomatic)
1	Wash with soap & cool water	Removes saliva antigens	Basic hygiene
2	Topical corticosteroid 1% hydrocortisone OTC	Anti-inflammatory	Strong (RCTs)
2	Calamine lotion / pramoxine 1% / menthol 0.5–1%	Counter-irritation, mild anesthetic	Moderate
3	Oral antihistamine (cetirizine 10 mg, loratadine 10 mg, fexofenadine 180 mg)	H1 blockade; less sedating than diphenhydramine	Strong for multiple bites
3	Topical antihistamine (diphenhydramine cream) — avoid on broken skin	Local H1 block	Weak; sensitization risk

What to Avoid

• Rubbing alcohol, witch hazel (astringent), tea tree oil (contact allergen), toothpaste (menthol + abrasives), baking soda paste (alkaline irritation).
• Scratching → excoriation, impetigo, scarring.

Special Populations

• Children: Trim nails; mittens at night; low-potency topical steroid (hydrocortisone 0.5–1%).
• Pregnancy: Topical hydrocortisone safe; oral cetirizine/loratadine category B.
• Skeeter Syndrome: Large local reaction (>10 cm) — may need oral prednisone burst; refer.

When to Seek Care

• Signs of infection: increasing redness, warmth, pus, red streaks, fever
• Systemic reaction: hives, lip/tongue swelling, dyspnea, dizziness → 911
• Bite not improving in 7–10 days
• Travel to endemic area + fever → malaria, dengue, Zika workup

Prevention

• EPA-registered repellents: DEET 20–30%, Picaridin 20%, IR3535, Oil of Lemon Eucalyptus (OLE/PMD).
• Permethrin-treated clothing.
• Eliminate standing water; screens; nets.