Re: bumps on legs and other places..
I think you should take him to his normal pediatrician. I'll bet it's not herpes, but is something that he needs treated!
What have you done? Cleaned the sores with anything? If you like using herbs and can find them somewhere close, buy some comfrey root, put a small amount (like a teaspoon) on a little plate, boil some water, and put a very little of it with the comfrey to make a paste (or very wet lumps of comfrey, if it wasn't ground up finely--that's okay.) It will get kind of gelatinous and sticky. Spread it on the sores, then cover them with a sterile pad held on with 1st aide tape. Then, if you want to, cover them with a heating pad on LOW (only low!) for a little while every so often. Let him sleep with the pads on, then in the morning take them off and wash the area gently with soap and water (or Neutrogena and water if his skin gets dry.) Apply the comfrey every time he's going to take a nap.
If they are infected, as the puss indicates, comfrey will draw out the infection.
This could be bug bites, a bacterial infection, an allergic reaction, yeast, or any number of things. Nurses don't always have the best information. Don't assume it's herpes and so forget to consider the many other conditions children can have!