A 10-month-old baby with 37.5 degrees is a case of low fever. If you measure the temperature in the armpit, the normal temperature should be between 36 degrees and 37 degrees, so 37.5 degrees is considered a case of low fever. It is best to find out the cause of your child’s fever and see if your child has a stuffy nose, runny nose or sore throat. If there are these symptoms, it is usually an upper respiratory tract infection. If there is diarrhea or abdominal pain, enteritis is generally considered more likely and a stool routine check is needed to see if it is a bacterial or viral infection. If it’s a bacterial infection, you need to take antibiotics for treatment; if it’s a viral infection, you can take oral rehydration salts to prevent dehydration, and it’s best to take your child to the hospital for specific tests to find out the cause and treat it.