Allergic contact dermatitis - External and Internal Eye
See also in: Overview,Cellulitis DDx,Anogenital,Hair and Scalp,Nail and Distal Digit,Oral Mucosal LesionAlerts and Notices
Synopsis
Contact dermatitis presents as either allergic or irritant in etiology. While irritant contact dermatitis represents the direct toxic effect of an offending agent on the skin, allergic contact dermatitis (ACD) represents a delayed-type (type IV) hypersensitivity reaction that occurs when allergens activate antigen-specific T cells in a sensitized individual. Consequently, whereas irritant contact dermatitis can occur after one exposure to the offending agent, ACD typically requires repeat exposures before an allergic response is noted. Allergic contact dermatitis can occur 24-48 hours after exposure to the offending agent.
Ocular involvement in ACD can occur in the setting of topical agents (medications or cosmetics), airborne agents, or innocuous transfer of the culprit agent via the fingertips.
With regards to topically applied agents, ACD reactions to medicated drops have been reported, including latanoprost, dorzolamide, and phenylephrine. ACD has also been reported in response to cosmetic products such as acrylate-containing glue used as a false-eyelash adhesive. Many eye shadow products include metals, which are top-ranking allergens in patients with eyelid dermatitis.
Nickel sulfate and gold are top-ranking allergens in periorbital dermatitis. Accidental transfer may occur when hands are contaminated by prior contact with metal products including jewelry. Similarly, fragrances can be transferred from the hands to the face. Eyelid dermatitis can also be seen due to allergens in artificial fingernails.
Airborne exposures have been implicated in occupational ACD, such as a reported case of persistent periorbital ACD in a dental technician due to rubber accelerator found in a colleague's protective gloves. These airborne exposures can sometimes be associated with respiratory difficulty, as described in cases of airborne ACD reactions to methylisothiazolinone.
Codes
ICD10CM:L23.9 – Allergic contact dermatitis, unspecified cause
SNOMEDCT:
40275004 – Contact dermatitis
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Differential Diagnosis & Pitfalls
- Dermatomyositis
- Preseptal or orbital cellulitis
- Cavernous sinus thrombosis
- Erysipelas
- Insect bite reaction
- Atopic dermatitis
- Seborrheic blepharitis
- Cutaneous anthrax
- Angioedema
- Necrotizing fasciitis
- Systemic amyloidosis
- Chagas disease in endemic areas of South and Central America
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Therapy
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Drug Reaction Data
Below is a list of drugs with literature evidence indicating an adverse association with this diagnosis. The list is continually updated through ongoing research and new medication approvals. Click on Citations to sort by number of citations or click on Medication to sort the medications alphabetically.Subscription Required
References
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Last Reviewed:10/02/2017
Last Updated:10/02/2017
Last Updated:10/02/2017
Patient Information for Allergic contact dermatitis - External and Internal Eye
Overview
Allergic contact dermatitis is a delayed hypersensitivity reaction (the reaction to the allergen occurs 48–72 hours after exposure). The most common allergens causing allergic contact dermatitis often change with time, as certain chemicals come in or out of use in the manufacture of products that come in contact with the skin. Most recently, common causes of allergic contact dermatitis include nickel, chromates, rubber chemicals, and topical antibiotic ointments and creams. Frequent sensitizers in the general population also include fragrance, formaldehyde, lanolin (wool grease found in ointments and cosmetics), and a host of other common environmental chemicals.- Nickel is found in jewelry, belt buckles, metal closures on clothing, and some cell phones.
- Chromates are used in the process of tanning leather for shoes and in cement, so they can affect construction workers who are in contact with cement.
- Rubber chemicals are found in gloves, balloons, elastic in garments, mouse pads, and swim goggles.
- Neomycin is common in triple antibiotic first aid ointments such as Neosporin (and generic versions of Neosporin) as well as other combination preparations with other antibacterials (eg, Polysporin). It may also be found in eye preparations and eardrops. Bacitracin is a common ingredient in antibiotic ointments and creams and can cause allergic contact dermatitis as well.
- Common allergen-containing products include sunscreens (oxybenzone [benzophenone-3]), cosmetics, soaps, dyes, and jewelry.
- Poison ivy is a frequent cause and is discussed separately.
Who’s At Risk
Allergic contact dermatitis can occur at any age in people of all ethnic backgrounds. Individuals with a skin condition (such as stasis dermatitis, otitis externa, or pruritus ani) requiring frequent application of topical agents can develop allergic contact dermatitis over time.Signs & Symptoms
Allergic contact dermatitis may occur on any location of the body.- Scaly red to pink areas of elevated skin (papules and plaques) and blisters (vesicles) may be seen. Individual lesions have distinct borders and often have a geometric shape with straight edges and sharp angles.
- Eyelid swelling is frequently seen when the allergen is unknowingly transferred from finger to lid. Affected areas are typically severely itchy.
- When the dermatitis is long-standing, the areas of elevation become thick and secondary bacterial infection is possible.
Self-Care Guidelines
- Avoid the offending agent.
- It may be helpful to avoid common triggers, such as fragrance, lanolin, nickel, etc.
- 1% over-the-counter hydrocortisone cream can be helpful in very mild cases. Topical (applied to the skin) antihistamines should be avoided.
When to Seek Medical Care
Seek medical evaluation for a persistent or recurrent rash of unknown origin. Your physician may perform patch testing to evaluate for potential contact allergies. Skin biopsy is sometimes used to confirm diagnosis.Treatments
Treatment is aimed at preventing contact with the allergen.- Symptomatic control of itching may include oral antihistamines.
- Medium- and high-potency topical steroids may be prescribed for rashes occurring on the extremities or trunk.
- Mild-potency topical steroids may be prescribed for thinner skin on the face and skin fold areas.
- In severe cases involving large body areas, a course of an oral steroid (prednisone) may be prescribed.
References
Bolognia, Jean L., ed. Dermatology, pp.227, 252-256. New York: Mosby, 2003.
Freedberg, Irwin M., ed. Fitzpatrick's Dermatology in General Medicine. 6th ed, pp.266, 1164-1165. New York: McGraw-Hill, 2003.
Allergic contact dermatitis - External and Internal Eye
See also in: Overview,Cellulitis DDx,Anogenital,Hair and Scalp,Nail and Distal Digit,Oral Mucosal Lesion