Brief Answer: Eczema Detailed Answer: Hi, I have gone through your query. Rashes shown in the picture are suggestive of allergic eczema. But what you are mentioning on penis after a week of primary lesion is not eczema and is suggestive of herpes. If you can send picture of later, i can help you with that too. Now for your lesion on leg which is eczema, you can apply topical corticosteroid like beclomethasone. Continue with benadryl for itch. If the lesion on penis came out to be Herpes genitalis then antiviral like acyclovir can be added. Hope I have answered your query. If you have any further questions I will be happy to help.