My 5 year developed small, red bumps on the bottom of his feet. The day before I took him to the doctor he broke out on the top of his feet, hands, elbows and knees. The bumps are mild and he says they do not itch. He will be seeing a dermatologist next week. He was on antibiotics for several weeks prior to this rash; twice for strep and then for a tick bite. My husband and I have been noticing his stool is a bright green as well. He is not a big vegetable eater. Is there any connection with the antibiotics, stool, and rash? Could he have killed all the good bacteria in his body?