I have several small itchy bumps in skin for past 5 or so days.. At first, I thought mosquito bites. The first one is blistered right now. I just noticed an itchy red spot on my neck. They re individual bumps - 3 on right arm, 1 on neck, I on back of head, 1 on chest. I m 63, had the shingles vaccine, and they re itchy, not painful. Wondering what it could be... Also, I care for 92 year old mother and 11 month old grandson often. Could I have something contagious?