Morphea is a rare, chronic inflammatory condition that affects the skin and subcutaneous tissues with an unclear etiology. Genetic predisposition, autoimmune dysregulation, and environmental factors play a role in its pathogenesis. It affects both adults and children and presents as erythematous patches or plaques that develop sclerotic centers with a violaceous border. Early diagnosis and treatment are crucial to minimize damage and physical sequelae.

We present here a 30-year old female who presented with a solitary, violet-hue in color, indurated plaque on her left forearm after wearing a metal smartwatch for 4 months. She experienced on and off episodes of overheating from the watch but continued wearing it. There was no associated pruritus, tenderness, or loss of sensation. Anti-dsDNA showed a borderline positive result. Vitamin D levels were below the lower limit revealing a severe Vitamin D deficiency. Dermoscopy revealed fibrotic beams, branching vessels and an erythematous to pink background. Histopathologic analysis showed superficial and deep perivascular and periadnexal infiltrates of lymphocytes and plasma cells with compact collagen bundles and notable loss of periadnexal fat. The patient was started on topical halobetasol then shifted to tacrolimus 0.01% and started on targeted NB-UVB. Excellent response was seen after 9 sessions of phototherapy. There was a decrease in induration, size and no further progression.

Morphea is a rare inflammatory condition without a clear etiology and early diagnosis and treatment are important. This case highlights the relationship between gadget trauma and the development of Morphea.