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Background: Dental amalgam is a commonly used restorative material due to its durability and cost-effectiveness; however, its mercury content may rarely trigger hypersensitivity reactions such as allergic contact dermatitis in susceptible individuals. Despite its widespread use, mercury-induced contact dermatitis remains underreported and poorly recognized, and the limited literature describing its clinical features, diagnostic approach, and management contributes to delayed diagnosis and low clinical awareness. This case report aimed to describe the clinical presentation, diagnostic evaluation, and outcome of mercury amalgam dental filling-induced contact dermatitis to improve recognition of this uncommon entity. Case Presentation: A 45-year-old male developed an intensely pruritic unilateral maculopapular eruption over the right chest and dorsal back nine days after placement of mercury amalgam restorations in the lower right molars. The eruption showed erythema, papules, and excoriations without systemic symptoms or alternative triggers. The temporal and anatomical correlation suggested a delayed-type hypersensitivity reaction, and patch testing was recommended for confirmation. Conclusion: This case highlights a rare instance of mercury amalgam-induced contact dermatitis presenting as a localized delayed hypersensitivity reaction. Clinicians should consider dental materials as potential etiological factors in unexplained cutaneous eruptions to ensure timely diagnosis and appropriate management.
: Dental Amalgam; Contact Dermatitis; Delayed Hypersensitivity; Patch Tests; Dental Restoration; Mercury; Case Report.