It is generally wrong to say that the best treatment for hernia in a three year old female baby is a hernia. Three-year-old female baby hernia may be abdominal wall hernia, diaphragmatic hernia, for different types of surgical treatment can be taken to improve the symptoms. 1. Abdominal wall hernia: To treat abdominal wall hernia, you need to cooperate with the doctor to receive surgical treatment. The commonly used surgical treatments include traditional hernia repair, tension-free hernia repair, and laparoscopic hernia repair. 2. Diaphragmatic hernia: If a diaphragmatic hernia causes a hernia in a three-year-old baby girl, it is best to undergo hernia repair or anti-reflux surgery as soon as possible. If the treatment is not timely, it may easily induce shock and jeopardize life and health. There may be other clinical treatments for hernia in three-year-old female babies. It is recommended that you take your child to the hospital as soon as possible to determine the cause of the condition and develop a personalized treatment plan for the cause.