<s>[INST] I have a 2 year old son who I just finished bath time with. We noticed 5 perfectly round circles about the size of a pea going straight down his spine. The circles are dark red and raised just a little. The circles are in a line starting about middle of back down to lower back... Any ideas of what this could be??! [/INST] Hi...by what you quote I feel that they could be spontaneous bruising due to a bleeding disorder or a simple allergy like urticaria. But if he is otherwise active I do not think you should worry about it. I want to tell you one important thing - Skin conditions are best diagnosed only after seeing directly. I suggest you to upload photographs of the same on this website, so that I can guide you scientifically. Hope my answer was helpful for you.  I am happy to help any time. Further clarifications and consultations on Chat Doctor are welcome. If you do not have any clarifications, you can close the discussion and rate the answer. Wish your kid good health. </s>