What Causes Fever in Newborns?

My baby, 3 months old, had a fever of 39 degrees yesterday without any symptoms of a cold. After coming home, the fever subsided but then fluctuated between 37.7 and 38 degrees. We don’t know what to do? What causes fever in newborns?
2 minutes to read

What Causes Frequent Urination During the Day in Children?

If a child frequently urinates during the day but sleeps through the night normally, it might be due to excessive water intake. It is recommended to observe the situation and consider a urine test to confirm if it is a urinary tract infection or neurogenic frequency. The language is in Traditional Chinese.
One minute to read