If your baby has recurrent fever even after taking Merlin, it means that the cause of the fever has not been solved, and you should first find out the cause of the fever and treat it in order to solve the recurrent fever. At this time, if the baby has a stuffy nose, runny nose, sore throat and hoarse voice, the fever is often caused by an infection of the upper respiratory tract and can be treated with anti-inflammatory drugs. For upper respiratory tract infections, it is recommended to use busulfan anti-inflammatory oral solution, which has certain anti-bacterial and anti-viral effects, and is often more effective for upper respiratory tract infections. If there is abdominal pain or diarrhea, often caused by acute gastroenteritis, you can use anti-diarrheal drugs, such as Simethicone. If there is an elevation of white blood cells in the blood or stool, it indicates a bacterial infection and the baby needs to be treated with antibiotics, such as pediatric cefixime granules.