What is this neck rash I have, is it shingles?

Shingles is a viral infection of the skin. The virus, Varicella zoster is actually the same virus that causes chicken pox. This virus can lay dormant in the nerves for decades. If you had chicken pox as a child, the virus can reactivate as an adult, causing shingles. Singles are typically more common in the elderly, probably due to their weakened immune systems caused by other health problems. Shingles usually only affects one side of the body, and mostly on the back and/or trunk area. It is painful to the point that even a light breeze can be difficult for the person to bear. The symptoms you've mentioned, and the pictures of your rash, lead me to believe you do not have shingles. The rash does resemble seborrhoeic dermatitis, but it's difficult to determine without a culture. You should see your physician just to be safe. Good luck to you :-)