Last week DS was playing in the garden and came inside itching with a rash on his back. I gave him some hay fever syrup. I took him to gp that night and was given mild steroid cream. It started to get better when after playing on the swing 3 days later he came in with the same rash on his tummy. Now it has been 5 days since then and it has changed from a "tiny bumpy all over rash" to 6-10 red itchy bumps, similar to mozzy bits. What else could it be? He just seems to be irritated by it on/off everyday.