Why does a baby have a fever without cold symptoms?

A baby may develop a fever without symptoms of a common cold, which could be caused by other factors. Fever is a natural response of the body to infection or other stimuli. 1. Bacterial or viral infections: Such as urinary tract infections, gastroenteritis, or ear infections. These infections sometimes do not present obvious cold symptoms but can cause elevated body temperature. Regular checkups and timely treatment can effectively manage these conditions. 2. Overheated environment: Excessive clothing, high ambient temperature, or direct sunlight may cause fever in babies. Adjusting the environmental temperature and clothing to ensure proper heat dissipation can help alleviate this type of fever. 3. Immune response or teething: A brief fever reaction may occur after vaccination, and teething may also be accompanied by a low-grade fever. In these cases, the fever is usually temporary and can be relieved with appropriate care. If a baby's fever persists or is accompanied by other symptoms, prompt medical attention should be sought.