"My 13-month-old baby has small bumps on their body?"

It is possible that the small bumps on the body of a 13-month-old baby could be due to heat rash. If the baby had a slight fever that has since resolved, it is important to monitor the situation. You can try using a gentle, unscented soap and a fragrance-free moisturizer to help alleviate the rash. If the bumps persist for more than a week or worsen, it would be advisable to consult a doctor for further evaluation.