What could be causing a recurrent fever, respiratory congestion, and new-onset leg pain in a 28-month-old toddler who recently completed antibiotics for a bacterial infection, especially given ongoing exposure to sick contacts at home and daycare?
It is very common for toddlers to catch a new viral illness shortly after finishing antibiotics, especially with sick contacts at daycare. The recurrent fever and congestion are likely from a new virus. Sometimes, common viruses can cause temporary muscle aches or mild joint inflammation, which might explain her leg pain. To keep her comfortable, you can use generic acetaminophen or ibuprofen. However, because of the new leg pain and her recent bacterial infection, please have her pediatrician evaluate her soon to ensure she is recovering safely.