Symptoms Begins with feeling unwell, a rash and maybe a slight temperature.
Spots are red and become fluid-filled blisters within a day or so.
Appear first on the chest and back, then spread, and eventually dry into scabs, which drop off. Unless spots are badly infected, they don't usually leave a scar. Give plenty to drink. Paracetamol will help bring down a temperature. Baths, loose comfortable clothes and calamine lotion can all ease the itchiness.