So I have done my research and looking at Sky News whom are usually good for info say a rash may be a sign. My 15 year old boy never gets any rash in his life and now has one on both arms only. Worst one is as pictured. It's also very itchy. I have tired to get a LIVI appt tonight but no luck I'll try again tomorrow. He took these himself before bed for me so I'll have to wait till tomorrow for better ones. They are both his right arm.