Young male with vesicular forearm rash

31y man with no significant PMH, developed a skin rash while working in his yard last week. He has been self-treating himself with OTC hydrocortisone and Benadryl, with poor response.
On examining his lt forearm, he had linear erythematous rash with vesicular and bullous eruptions.
What is the diagnosis?

1. Poison ivy/ Oak dermatitis- CORRECT ANSWER
2. Early herpes zoster
3. Erysipelas
4. Inflammatory epidermal dermatophytosis
5. Insect bite

• Discussion by Raj