Hives at Work: When to Stay, When to Go, and When to Seek Care

Urticaria (hives) varies from mild itching to life-threatening anaphylaxis. Workplace decisions depend on severity and triggers.

Assess Severity

Severity	Features	Action
Mild	Localized itching, few wheals, no systemic symptoms	Oral non-sedating antihistamine (cetirizine, loratadine, fexofenadine); cool compress; continue work if comfortable
Moderate	Widespread wheals, significant itch/distraction, no airway involvement	Antihistamine + consider H2 blocker (famotidine); short-acting steroid burst if persistent; may need to leave if focus impaired
Severe / Anaphylaxis	Angioedema (lips, tongue, throat), dyspnea, wheeze, stridor, hypotension, syncope, abdominal pain	EPINEPHRINE IM immediately → CALL 911. Do not drive. This is a medical emergency.

Workplace Triggers to Consider

• Temperature extremes, sweat, pressure (tight clothing, tools)
• Chemicals, latex, cleaning agents, food allergens (airborne)
• Stress (cholinergic urticaria)
• Physical stimuli: cold, heat, vibration, sunlight (solar urticaria)

Documentation & Accommodation

• Document episodes (time, activity, exposures, photos).
• Request accommodations (ADA): cooler environment, modified PPE, schedule flexibility, remote work during flares.
• Allergist/immunologist evaluation for chronic urticaria (>6 weeks): stepwise therapy (high-dose antihistamines → omalizumab → cyclosporine).

Your safety comes first. When in doubt, leave and seek care.