A 33‐year‐old male tour guide presented at our clinic with rash and swelling on the anterior upper arms. He was not alcohol or drug dependent and had no relevant medical and family history. He never walked barefoot. His symptoms developed 3–4 weeks after he had last eaten grilled frog. His physical examination was unremarkable other than the rash. He developed raised, erythematous and serpiginous skin lesions accompanied by pruritus, mild pain, redness and hot feeling on the middle‐third forearms for 10 days (Box 1). The rash spread distally and caused formication. He was well and had no fever or other specific symptoms.
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