If the baby has a cold, it is not recommended to go swimming. A cold, also known as acute upper respiratory tract infection, is the most common illness in children. It primarily manifests as inflammation of the nasal, nasopharyngeal, and pharyngeal mucosa, which can lead to rhinitis, pharyngitis, and tonsillitis, among others. The majority of colds are caused by viruses and bacteria, with 90% being viral infections. During this period, a child's resistance is generally weaker. Therefore, in such cases, it is advisable for the child to rest more, drink plenty of water, and avoid vigorous activities. Hence, it is not recommended for children to go swimming in this situation; they should rest more instead.