I have red bumps about the size of my thumbprint in several places: 1 on each side of my waist , 4 on my braline, 3 on my lower legs, 1 on my hip, 1 on my ribs, and 3-5 on my back. They are very itchy, but don t seem to have any pus or liquid. I was sitting in some grass two days ago, and they appeared yesterday. Could they be hives or some sort of bug bite?