I just notice a small bruise on my 8 month old sons arm with a tiny red dot in the middle. The bruise or the dot are not swollen, are not hot to the touch, and do not seem to be bothering him in anyway. But I am worried. It does not appear to be a spider bite, but then again I have never seen a bite right after it happened only after it got bad. The red mark though is not an open wound, but more like a tiny red dot that appears, it does not look as though it is puss feeled or anything, just a bruised circle with a red dot. I am bit on the worrying because my daught seems to always get sick but lately since she has gotten older seems to be growing out of it, I only hope my son will not be the same way. I am just concerned as to what could have caused this bruise even if it is nothing.